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 (
    87532, 88448, 88465, 88481, 88784, 88171, 
    88219, 88785, 84772, 84785, 84794, 
    85668, 85688, 85700, 85712, 88769, 
    87546, 87549, 88402, 88405, 85676, 
    84776, 88197, 88209, 87515, 87531, 
    89109, 89116, 88195, 88207, 88768, 
    88449, 88466, 88482, 88690, 88737, 
    89108, 89115, 88675, 88722, 90834, 
    88447, 88464, 88480, 88691, 88738, 
    87548, 88767, 88583, 88674, 88721, 
    88582, 90833, 88545, 88403, 88765, 
    88566, 87617, 87625, 88673, 88720, 
    88401, 88565, 88564, 87636, 89107, 
    89114, 90832, 87621, 87623, 88671, 
    88718, 87635, 87638, 87640, 87632, 
    88561, 87637
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00186

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "35.14"
    },
    "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": 78,
      "rows_produced_per_join": 78,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "27.34",
        "eval_cost": "7.80",
        "prefix_cost": "35.14",
        "data_read_per_join": "297K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (87532,88448,88465,88481,88784,88171,88219,88785,84772,84785,84794,85668,85688,85700,85712,88769,87546,87549,88402,88405,85676,84776,88197,88209,87515,87531,89109,89116,88195,88207,88768,88449,88466,88482,88690,88737,89108,89115,88675,88722,90834,88447,88464,88480,88691,88738,87548,88767,88583,88674,88721,88582,90833,88545,88403,88765,88566,87617,87625,88673,88720,88401,88565,88564,87636,89107,89114,90832,87621,87623,88671,88718,87635,87638,87640,87632,88561,87637)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}