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 (
    97916, 97917, 97918, 97919, 97920, 97921, 
    97922, 97923, 97924, 97925, 97926, 
    97927, 97928, 97929, 97930, 97931, 
    97932, 97933, 97934, 97935, 97936, 
    97937, 97938, 97939, 97940, 97941, 
    97942, 97943, 97944, 97945, 97946, 
    97947, 97948, 97949, 97950, 97951, 
    97952, 97960, 97961, 97962, 97963, 
    97964, 97965, 97966, 97967, 97968, 
    97969, 97970, 97971, 97972, 97973, 
    97974, 97975, 97976, 97977, 97978, 
    97979, 97980, 97981, 97982, 97983, 
    97984, 97985, 97986, 97987, 98001, 
    98040, 98041, 98042, 98043, 98044, 
    98045, 98046, 98047, 98048, 98049, 
    98050, 98051, 98084, 98085, 98086, 
    98087, 98088, 98089, 98090, 98091, 
    98092, 98093, 98094, 98095, 98096, 
    98097, 98098, 98099, 98100, 98101
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00147

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 (97916,97917,97918,97919,97920,97921,97922,97923,97924,97925,97926,97927,97928,97929,97930,97931,97932,97933,97934,97935,97936,97937,97938,97939,97940,97941,97942,97943,97944,97945,97946,97947,97948,97949,97950,97951,97952,97960,97961,97962,97963,97964,97965,97966,97967,97968,97969,97970,97971,97972,97973,97974,97975,97976,97977,97978,97979,97980,97981,97982,97983,97984,97985,97986,97987,98001,98040,98041,98042,98043,98044,98045,98046,98047,98048,98049,98050,98051,98084,98085,98086,98087,98088,98089,98090,98091,98092,98093,98094,98095,98096,98097,98098,98099,98100,98101)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}