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 (271, 308, 272, 273, 274) 
  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 
  2880, 96

Query time 0.11993

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "15.72"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 5,
              "rows_produced_per_join": 0,
              "filtered": "4.00",
              "index_condition": "(`gaseus`.`cscart_categories`.`category_id` in (271,308,272,273,274))",
              "cost_info": {
                "read_cost": "3.49",
                "eval_cost": "0.02",
                "prefix_cost": "3.51",
                "data_read_per_join": "822"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`gaseus`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`gaseus`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`gaseus`.`cscart_categories`.`usergroup_ids`))) and (`gaseus`.`cscart_categories`.`status` in ('A','H')) and (`gaseus`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "ALL",
              "possible_keys": [
                "PRIMARY"
              ],
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 0,
              "filtered": "50.00",
              "using_join_buffer": "hash join",
              "cost_info": {
                "read_cost": "0.62",
                "eval_cost": "0.02",
                "prefix_cost": "4.15",
                "data_read_per_join": "1K"
              },
              "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": [
                "gaseus.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 110,
              "rows_produced_per_join": 22,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.19",
                "eval_cost": "2.20",
                "prefix_cost": "6.54",
                "data_read_per_join": "352"
              },
              "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": 1,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "5.50",
                "eval_cost": "0.11",
                "prefix_cost": "14.24",
                "data_read_per_join": "7K"
              },
              "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": 1,
              "filtered": "99.97",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.28",
                "eval_cost": "0.11",
                "prefix_cost": "14.63",
                "data_read_per_join": "26"
              },
              "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": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.32",
                "eval_cost": "0.11",
                "prefix_cost": "15.06",
                "data_read_per_join": "4K"
              },
              "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": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.55",
                "eval_cost": "0.11",
                "prefix_cost": "15.72",
                "data_read_per_join": "5K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}

Result

product_id product company_name product_type parent_product_id
5390 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5391 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5392 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5393 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5394 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5395 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5396 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5397 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5398 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5399 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5400 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5401 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5402 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5403 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5404 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5405 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5406 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5407 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5408 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5409 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5410 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5411 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5412 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5413 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
5414 Main ribbed regulator Vulkan HR60/300 EFFECT Inert gas, DIN 477-5, 15-60 bar Gaseus P 0
6728 Main ribbed regulator Vulkan HR60/300 EFFECT Nitrogen, for EB/BS 120/300 Gaseus P 0
515 Main ribbed regulator Vulkan HR60/300 EFFECT Oxygen, for EB/BS 120/300 Gaseus P 0
3156 Main ribbed regulator Vulkan HR60/300 EFFECT Oxygen, for EB/BS 120/300 Gaseus P 0
3676 Main ribbed regulator Vulkan HR60/300 EFFECT Oxygen, for EB/BS 120/300 Gaseus P 0
5131 Main ribbed regulator Vulkan HR60/300 EFFECT Oxygen, for EB/BS 120/300 Gaseus P 0
3834 Point-of-use regulator E10F Gaseus P 0
3833 Point-of-use regulator EH40-20 Gaseus P 0
2130 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2131 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2132 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2133 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2134 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2135 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2136 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2137 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2138 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2139 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2140 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2141 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2142 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2143 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2144 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2145 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2146 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2147 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2148 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2149 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2150 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2151 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2152 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2153 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2154 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2155 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2156 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2157 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2158 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2159 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2160 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2161 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2162 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2163 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2164 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2165 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2166 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2167 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2168 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2169 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2170 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2171 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2172 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2173 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2174 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2175 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2176 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2177 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2178 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2179 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2180 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2181 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2182 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2183 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
2184 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3779 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3780 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3781 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3782 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3783 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3784 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3785 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3786 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0
3787 Point-of-use regulator EH40-20 Oxygen 0,5 - 20 bar Gaseus P 0