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 (
    88904, 90824, 90825, 87232, 87233, 87237, 
    87238, 87242, 87243, 87247, 87248, 
    84251, 84256, 87580, 87595, 87610, 
    88791, 84250, 84255, 87578, 87579, 
    87593, 87594, 87608, 87609, 88151, 
    88153, 88789, 88790, 87653, 87667, 
    87674, 87681, 87702, 87710, 87711, 
    87724, 87725, 87652, 87658, 87666, 
    87672, 87673, 87679, 87680, 87686, 
    87701, 87707, 87709, 87721, 87723, 
    87735, 88694, 88695, 88741, 88742, 
    88149, 88587, 84241, 87234, 87235, 
    87236, 87239, 87240, 87241, 87244, 
    87245, 87246, 87249, 87250, 87251, 
    84240, 88588, 84239, 84238, 84254, 
    84259, 87577, 87592, 87607, 88788, 
    90054, 90056, 90057, 84252, 84253, 
    84257, 84258, 87575, 87576, 87590, 
    87591, 87605, 87606, 88786, 88787
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00174

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 (88904,90824,90825,87232,87233,87237,87238,87242,87243,87247,87248,84251,84256,87580,87595,87610,88791,84250,84255,87578,87579,87593,87594,87608,87609,88151,88153,88789,88790,87653,87667,87674,87681,87702,87710,87711,87724,87725,87652,87658,87666,87672,87673,87679,87680,87686,87701,87707,87709,87721,87723,87735,88694,88695,88741,88742,88149,88587,84241,87234,87235,87236,87239,87240,87241,87244,87245,87246,87249,87250,87251,84240,88588,84239,84238,84254,84259,87577,87592,87607,88788,90054,90056,90057,84252,84253,84257,84258,87575,87576,87590,87591,87605,87606,88786,88787)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}