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 (
    92401, 92402, 92403, 92404, 92405, 92406, 
    92407, 92557, 87148, 87149, 87150, 
    87151, 87152, 87153, 87286, 92400, 
    92417, 92418, 92419, 92420, 92421, 
    92422, 92423, 87154, 87155, 87156, 
    87157, 87158, 87159, 87287, 92169, 
    92170, 92390, 92391, 92392, 92393, 
    92394, 92416, 91945, 91946, 91947, 
    91948, 91949, 91950, 91951, 87142, 
    87143, 87144, 87145, 87146, 87147, 
    87285, 87172, 87173, 87174, 87175, 
    87176, 87177, 87160, 87161, 87162, 
    87163, 87164, 87165, 87166, 87167, 
    87168, 87169, 87170, 87171, 87136, 
    87137, 87138, 87139, 87140, 87141, 
    87284, 82549, 82371, 92255, 92256, 
    92257, 92496, 92497, 92498, 92499, 
    82450, 82451, 82449, 84909, 91944, 
    91550, 91619, 91788, 91789, 91790
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00154

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "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",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (92401,92402,92403,92404,92405,92406,92407,92557,87148,87149,87150,87151,87152,87153,87286,92400,92417,92418,92419,92420,92421,92422,92423,87154,87155,87156,87157,87158,87159,87287,92169,92170,92390,92391,92392,92393,92394,92416,91945,91946,91947,91948,91949,91950,91951,87142,87143,87144,87145,87146,87147,87285,87172,87173,87174,87175,87176,87177,87160,87161,87162,87163,87164,87165,87166,87167,87168,87169,87170,87171,87136,87137,87138,87139,87140,87141,87284,82549,82371,92255,92256,92257,92496,92497,92498,92499,82450,82451,82449,84909,91944,91550,91619,91788,91789,91790)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}