SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    92068, 92069, 92070, 92071, 92072, 92073, 
    92083, 92084, 92085, 92086, 92087, 
    92088, 92089, 91297, 92139, 92140, 
    92141, 92142, 92143, 92144, 92145, 
    86380, 92043, 92044, 92045, 92046, 
    92047, 92048, 92049, 92059, 92060, 
    92061, 92062, 92063, 92064, 92065, 
    92075, 92076, 92077, 92078, 92079, 
    92080, 92081, 92131, 92132, 92133, 
    92134, 92135
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00110

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (92068,92069,92070,92071,92072,92073,92083,92084,92085,92086,92087,92088,92089,91297,92139,92140,92141,92142,92143,92144,92145,86380,92043,92044,92045,92046,92047,92048,92049,92059,92060,92061,92062,92063,92064,92065,92075,92076,92077,92078,92079,92080,92081,92131,92132,92133,92134,92135)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}