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, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    114, 115, 116, 117, 210, 211, 212, 213, 
    214, 215, 216, 217, 218, 219, 220, 221, 
    222, 223, 278, 279, 280, 281, 282, 283, 
    284, 332, 333, 334, 335, 336, 337, 3915, 
    3916, 3917, 3918, 3919, 3920, 3921, 
    3968, 3969, 3970, 3971, 3972, 3973, 
    3974, 4020, 4021, 4022, 4023, 4024, 
    4025, 4026, 4094, 4095, 4096, 4097, 
    4098, 4099, 4100, 4101, 4102, 4103, 
    4104, 4105, 4106, 4107, 4163, 4164, 
    4165, 4166, 4167, 4168, 4169, 4216, 
    4217, 4218, 4219, 4220, 4221, 4222, 
    196, 197, 198, 199, 200, 201, 202, 271, 
    272, 273, 274, 275, 276, 277, 325, 326
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00158

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "115.60"
    },
    "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": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "index_condition": "((`gaseus`.`cscart_product_descriptions`.`product_id` in (114,115,116,117,210,211,212,213,214,215,216,217,218,219,220,221,222,223,278,279,280,281,282,283,284,332,333,334,335,336,337,3915,3916,3917,3918,3919,3920,3921,3968,3969,3970,3971,3972,3973,3974,4020,4021,4022,4023,4024,4025,4026,4094,4095,4096,4097,4098,4099,4100,4101,4102,4103,4104,4105,4106,4107,4163,4164,4165,4166,4167,4168,4169,4216,4217,4218,4219,4220,4221,4222,196,197,198,199,200,201,202,271,272,273,274,275,276,277,325,326)) and (`gaseus`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "106.01",
        "eval_cost": "9.60",
        "prefix_cost": "115.61",
        "data_read_per_join": "438K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text",
        "unit_name"
      ]
    }
  }
}