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 (
    95487, 95494, 95495, 95496, 95505, 95506, 
    95509, 95510, 96182, 96183, 96184, 
    96185, 96785, 96786, 96817, 96818, 
    96819, 96820, 96821, 96822, 96823, 
    96824, 96825, 96893, 96894, 96895, 
    96896, 96897, 96898, 96899, 96900, 
    96901, 96902, 96903, 96904, 96905, 
    96906, 96907, 96908, 96909, 96910, 
    96911, 96912, 96913, 96914, 96915, 
    96916, 96969, 96970, 96971, 96972, 
    96973, 96974, 96975, 96976, 96977, 
    96978, 96979, 96980, 98516, 98891, 
    98894, 98895, 98896, 100248, 100249, 
    100250, 100254, 100255, 100256, 100257, 
    100258, 100259, 100328, 100329, 100330, 
    100335, 100336, 100438, 100439, 100440, 
    100441, 100442, 100443, 100444, 101536, 
    101537, 101538, 101539
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00101

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "40.09"
    },
    "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": 89,
      "rows_produced_per_join": 89,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "31.19",
        "eval_cost": "8.90",
        "prefix_cost": "40.09",
        "data_read_per_join": "339K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (95487,95494,95495,95496,95505,95506,95509,95510,96182,96183,96184,96185,96785,96786,96817,96818,96819,96820,96821,96822,96823,96824,96825,96893,96894,96895,96896,96897,96898,96899,96900,96901,96902,96903,96904,96905,96906,96907,96908,96909,96910,96911,96912,96913,96914,96915,96916,96969,96970,96971,96972,96973,96974,96975,96976,96977,96978,96979,96980,98516,98891,98894,98895,98896,100248,100249,100250,100254,100255,100256,100257,100258,100259,100328,100329,100330,100335,100336,100438,100439,100440,100441,100442,100443,100444,101536,101537,101538,101539)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}