SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id 
FROM 
  cscart_products as products 
  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 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) 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  product asc, 
  products.product_id ASC 
LIMIT 
  384, 96

Query time 0.02055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "849.65"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "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",
                "idx_parent_product_id"
              ],
              "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": 81,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "405.25",
                "eval_cost": "8.11",
                "prefix_cost": "740.55",
                "data_read_per_join": "529K"
              },
              "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`.`parent_product_id` = 0) 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": 81,
              "filtered": "99.97",
              "using_index": true,
              "cost_info": {
                "read_cost": "20.26",
                "eval_cost": "8.10",
                "prefix_cost": "768.92",
                "data_read_per_join": "1K"
              },
              "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": "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": 81,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "23.85",
                "eval_cost": "8.10",
                "prefix_cost": "800.86",
                "data_read_per_join": "308K"
              },
              "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": 81,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "40.68",
                "eval_cost": "8.10",
                "prefix_cost": "849.65",
                "data_read_per_join": "369K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}

Result

product_id product company_name product_type parent_product_id
114 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
115 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
116 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
117 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
210 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
211 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
212 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
213 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
214 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
215 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
216 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
217 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
218 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
219 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
220 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
221 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
222 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
223 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
278 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
279 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
280 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
281 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
282 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
283 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
284 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
332 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
333 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
334 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
335 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
336 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
337 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3915 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3916 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3917 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3918 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3919 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3920 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3921 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3968 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3969 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3970 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3971 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3972 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3973 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
3974 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4020 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4021 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4022 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4023 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4024 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4025 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4026 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4094 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4095 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4096 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4097 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4098 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4099 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4100 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4101 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4102 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4103 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4104 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4105 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4106 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4107 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4163 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4164 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4165 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4166 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4167 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4168 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4169 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4216 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4217 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4218 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4219 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4220 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4221 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
4222 Line pressure regulator Nitrogen 0-20 bar Vulkan L20 Gaseus P 0
196 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
197 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
198 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
199 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
200 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
201 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
202 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
271 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
272 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
273 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
274 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
275 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
276 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
277 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
325 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0
326 Line pressure regulator Nitrogen 0-40 bar Vulkan L40 Gaseus P 0