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 (
    94778, 94779, 94780, 94781, 94782, 94783, 
    94784, 94785, 94786, 94787, 94788, 
    94789, 94790, 94791, 94792, 94793, 
    94794, 94795, 94814, 94815, 94833, 
    94834, 94835, 94836, 94837, 95443, 
    95444, 95445, 95446, 95447, 95791, 
    95792, 95793, 95794, 95795, 95796, 
    95797, 95798, 95799, 95800, 95801, 
    95802, 95804, 95806, 95808, 95810, 
    95812, 96564, 96565, 96566, 96567, 
    96568, 97716, 97717, 97718, 97774, 
    97786, 98146, 98148, 98152, 98155, 
    98407, 98408, 98409, 98410, 98552, 
    98553, 98554, 98555, 98556, 98763, 
    98764, 98765, 98766, 98767, 98768, 
    98818, 98822, 98826, 98830, 98859, 
    98860, 98861, 98862, 98863, 98865, 
    98867, 98869, 98871, 98873, 98910, 
    98911, 98912, 98913, 99313, 99314
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00171

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "51.87"
    },
    "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": "42.27",
        "eval_cost": "9.60",
        "prefix_cost": "51.87",
        "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 (94778,94779,94780,94781,94782,94783,94784,94785,94786,94787,94788,94789,94790,94791,94792,94793,94794,94795,94814,94815,94833,94834,94835,94836,94837,95443,95444,95445,95446,95447,95791,95792,95793,95794,95795,95796,95797,95798,95799,95800,95801,95802,95804,95806,95808,95810,95812,96564,96565,96566,96567,96568,97716,97717,97718,97774,97786,98146,98148,98152,98155,98407,98408,98409,98410,98552,98553,98554,98555,98556,98763,98764,98765,98766,98767,98768,98818,98822,98826,98830,98859,98860,98861,98862,98863,98865,98867,98869,98871,98873,98910,98911,98912,98913,99313,99314)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}