SELECT 
  SQL_CALC_FOUND_ROWS (
    CASE WHEN products.parent_product_id <> 0 THEN products.parent_product_id ELSE products.product_id END
  ) AS product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name, 
  GROUP_CONCAT(
    products.product_id 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS product_ids, 
  GROUP_CONCAT(
    products.product_type 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS product_types, 
  GROUP_CONCAT(
    products.parent_product_id 
    ORDER BY 
      products.parent_product_id ASC, 
      products.product_id ASC
  ) AS parent_product_ids, 
  products.product_type, 
  products.parent_product_id 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_features_values as var_val_18 ON var_val_18.product_id = products.product_id 
  AND var_val_18.lang_code = 'en' 
  AND var_val_18.feature_id = 18 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ult_product_descriptions shared_descr ON shared_descr.product_id = products.product_id 
  AND shared_descr.company_id = 1 
  AND shared_descr.lang_code = 'en' 
WHERE 
  1 
  AND (
    var_val_18.variant_id IN (1202)
  ) 
  AND cscart_categories.category_id IN (273) 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
GROUP BY 
  product_id 
ORDER BY 
  product asc, 
  products.product_id ASC 
LIMIT 
  288, 96

Query time 0.02279

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1015.36"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": true,
        "buffer_result": {
          "using_temporary_table": true,
          "nested_loop": [
            {
              "table": {
                "table_name": "cscart_categories",
                "access_type": "const",
                "possible_keys": [
                  "PRIMARY",
                  "c_status",
                  "p_category_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "category_id"
                ],
                "key_length": "3",
                "ref": [
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 1,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "0.00",
                  "eval_cost": "0.10",
                  "prefix_cost": "0.00",
                  "data_read_per_join": "4K"
                },
                "used_columns": [
                  "category_id",
                  "storefront_id",
                  "usergroup_ids",
                  "status"
                ]
              }
            },
            {
              "table": {
                "table_name": "companies",
                "access_type": "ALL",
                "possible_keys": [
                  "PRIMARY"
                ],
                "rows_examined_per_scan": 2,
                "rows_produced_per_join": 1,
                "filtered": "50.00",
                "cost_info": {
                  "read_cost": "0.62",
                  "eval_cost": "0.10",
                  "prefix_cost": "0.72",
                  "data_read_per_join": "5K"
                },
                "used_columns": [
                  "company_id",
                  "status",
                  "company"
                ],
                "attached_condition": "(`gaseus`.`companies`.`status` = 'A')"
              }
            },
            {
              "table": {
                "table_name": "products_categories",
                "access_type": "ref",
                "possible_keys": [
                  "PRIMARY",
                  "pt"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "category_id"
                ],
                "key_length": "3",
                "ref": [
                  "const"
                ],
                "rows_examined_per_scan": 1621,
                "rows_produced_per_join": 1621,
                "filtered": "100.00",
                "using_index": true,
                "cost_info": {
                  "read_cost": "10.38",
                  "eval_cost": "162.10",
                  "prefix_cost": "173.20",
                  "data_read_per_join": "25K"
                },
                "used_columns": [
                  "product_id",
                  "category_id"
                ]
              }
            },
            {
              "table": {
                "table_name": "products",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "status"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "3",
                "ref": [
                  "gaseus.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 162,
                "filtered": "10.00",
                "cost_info": {
                  "read_cost": "405.25",
                  "eval_cost": "16.20",
                  "prefix_cost": "740.55",
                  "data_read_per_join": "1M"
                },
                "used_columns": [
                  "product_id",
                  "product_type",
                  "status",
                  "company_id",
                  "usergroup_ids",
                  "parent_product_id"
                ],
                "attached_condition": "((`gaseus`.`products`.`company_id` = `gaseus`.`companies`.`company_id`) and ((`gaseus`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`gaseus`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`gaseus`.`products`.`usergroup_ids`))) and (`gaseus`.`products`.`status` = 'A'))"
              }
            },
            {
              "table": {
                "table_name": "prices",
                "access_type": "ref",
                "possible_keys": [
                  "usergroup",
                  "product_id",
                  "lower_limit",
                  "usergroup_id"
                ],
                "key": "usergroup",
                "used_key_parts": [
                  "product_id"
                ],
                "key_length": "3",
                "ref": [
                  "gaseus.products_categories.product_id"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 161,
                "filtered": "99.97",
                "using_index": true,
                "cost_info": {
                  "read_cost": "40.51",
                  "eval_cost": "16.20",
                  "prefix_cost": "797.26",
                  "data_read_per_join": "3K"
                },
                "used_columns": [
                  "product_id",
                  "lower_limit",
                  "usergroup_id"
                ],
                "attached_condition": "((`gaseus`.`prices`.`lower_limit` = 1) and (`gaseus`.`prices`.`usergroup_id` in (0,0,1)))"
              }
            },
            {
              "table": {
                "table_name": "var_val_18",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "fl",
                  "variant_id",
                  "lang_code",
                  "product_id",
                  "fpl",
                  "idx_product_feature_variant_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "feature_id",
                  "product_id",
                  "variant_id",
                  "lang_code"
                ],
                "key_length": "15",
                "ref": [
                  "const",
                  "gaseus.products_categories.product_id",
                  "const",
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 161,
                "filtered": "100.00",
                "using_index": true,
                "cost_info": {
                  "read_cost": "40.50",
                  "eval_cost": "16.20",
                  "prefix_cost": "853.96",
                  "data_read_per_join": "125K"
                },
                "used_columns": [
                  "feature_id",
                  "product_id",
                  "variant_id",
                  "lang_code"
                ]
              }
            },
            {
              "table": {
                "table_name": "shared_descr",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "product_id",
                  "company_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id",
                  "lang_code",
                  "company_id"
                ],
                "key_length": "13",
                "ref": [
                  "gaseus.products_categories.product_id",
                  "const",
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 161,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "47.67",
                  "eval_cost": "16.20",
                  "prefix_cost": "917.83",
                  "data_read_per_join": "617K"
                },
                "used_columns": [
                  "product_id",
                  "lang_code",
                  "company_id",
                  "product"
                ]
              }
            },
            {
              "table": {
                "table_name": "descr1",
                "access_type": "eq_ref",
                "possible_keys": [
                  "PRIMARY",
                  "product_id"
                ],
                "key": "PRIMARY",
                "used_key_parts": [
                  "product_id",
                  "lang_code"
                ],
                "key_length": "9",
                "ref": [
                  "gaseus.products_categories.product_id",
                  "const"
                ],
                "rows_examined_per_scan": 1,
                "rows_produced_per_join": 161,
                "filtered": "100.00",
                "cost_info": {
                  "read_cost": "81.33",
                  "eval_cost": "16.20",
                  "prefix_cost": "1015.36",
                  "data_read_per_join": "739K"
                },
                "used_columns": [
                  "product_id",
                  "lang_code",
                  "product"
                ]
              }
            }
          ]
        }
      }
    }
  }
}

Result

product_id product company_name product_ids product_types parent_product_ids product_type parent_product_id
226 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 226 P 0 P 0
227 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 227 P 0 P 0
228 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 228 P 0 P 0
229 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 229 P 0 P 0
230 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 230 P 0 P 0
231 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 231 P 0 P 0
232 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 232 P 0 P 0
264 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 264 P 0 P 0
265 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 265 P 0 P 0
266 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 266 P 0 P 0
267 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 267 P 0 P 0
268 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 268 P 0 P 0
269 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 269 P 0 P 0
270 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 270 P 0 P 0
318 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 318 P 0 P 0
319 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 319 P 0 P 0
320 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 320 P 0 P 0
321 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 321 P 0 P 0
322 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 322 P 0 P 0
323 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 323 P 0 P 0
3961 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3961 P 0 P 0
3962 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3962 P 0 P 0
3963 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3963 P 0 P 0
3964 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3964 P 0 P 0
3965 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3965 P 0 P 0
3966 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3966 P 0 P 0
3967 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 3967 P 0 P 0
4006 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4006 P 0 P 0
4007 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4007 P 0 P 0
4008 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4008 P 0 P 0
4009 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4009 P 0 P 0
4010 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4010 P 0 P 0
4011 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4011 P 0 P 0
4012 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4012 P 0 P 0
4066 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4066 P 0 P 0
4067 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4067 P 0 P 0
4068 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4068 P 0 P 0
4069 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4069 P 0 P 0
4070 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4070 P 0 P 0
4071 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4071 P 0 P 0
4072 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4072 P 0 P 0
4073 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4073 P 0 P 0
4074 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4074 P 0 P 0
4075 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4075 P 0 P 0
4076 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4076 P 0 P 0
4077 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4077 P 0 P 0
4078 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4078 P 0 P 0
4079 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4079 P 0 P 0
4110 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4110 P 0 P 0
4111 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4111 P 0 P 0
4112 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4112 P 0 P 0
4113 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4113 P 0 P 0
4114 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4114 P 0 P 0
4115 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4115 P 0 P 0
4116 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4116 P 0 P 0
4149 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4149 P 0 P 0
4150 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4150 P 0 P 0
4151 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4151 P 0 P 0
4152 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4152 P 0 P 0
4153 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4153 P 0 P 0
4154 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4154 P 0 P 0
4155 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4155 P 0 P 0
4202 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4202 P 0 P 0
4203 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4203 P 0 P 0
4204 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4204 P 0 P 0
4205 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4205 P 0 P 0
4206 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4206 P 0 P 0
4207 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4207 P 0 P 0
4208 Line pressure regulator Nitrogen 0-10 bar Vulkan L10 Gaseus 4208 P 0 P 0
3109 Line pressure regulator Nitrogen 0-10 bar Vulkan L10/2 Gaseus 3109 P 0 P 0
3123 Line pressure regulator Nitrogen 0-10 bar Vulkan L10/2 Gaseus 3123 P 0 P 0
6671 Line pressure regulator Nitrogen 0-10 bar Vulkan L10/2 Gaseus 6671 P 0 P 0
6676 Line pressure regulator Nitrogen 0-10 bar Vulkan L10/2 Gaseus 6676 P 0 P 0
6684 Line pressure regulator Nitrogen 0-10 bar Vulkan L10/2 Gaseus 6684 P 0 P 0
5 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 5 P 0 P 0
6 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 6 P 0 P 0
7 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 7 P 0 P 0
8 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 8 P 0 P 0
9 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 9 P 0 P 0
10 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 10 P 0 P 0
11 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 11 P 0 P 0
57 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 57 P 0 P 0
58 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 58 P 0 P 0
59 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 59 P 0 P 0
60 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 60 P 0 P 0
61 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 61 P 0 P 0
62 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 62 P 0 P 0
63 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 63 P 0 P 0
111 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 111 P 0 P 0
112 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 112 P 0 P 0
113 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 113 P 0 P 0
114 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 114 P 0 P 0
115 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 115 P 0 P 0
116 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 116 P 0 P 0
117 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 117 P 0 P 0
210 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus 210 P 0 P 0