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 (
    87656, 87670, 87677, 87684, 87705, 87716, 
    87717, 87730, 87731, 90022, 90024, 
    90038, 90040, 90041, 87654, 87655, 
    87668, 87669, 87675, 87676, 87682, 
    87683, 87703, 87704, 87713, 87715, 
    87727, 87729, 88692, 88693, 88739, 
    88740, 90023, 90039, 90055, 87581, 
    87596, 87611, 88150, 88152, 88792, 
    87657, 87671, 87678, 87685, 87706, 
    87719, 87733, 88696, 88743, 88146, 
    88589, 84244, 84243, 88585, 84242, 
    88584, 88907, 88908, 88905, 88906, 
    88910, 88909, 92913, 92914, 92915, 
    92916, 92917, 92918, 92919, 92920, 
    92921, 93753, 93754, 93755, 93756, 
    93757, 93758, 93759, 93760, 93761, 
    93762, 93763, 93764, 93765, 93766, 
    93767, 93768, 93769, 93770, 93771, 
    93772, 93773, 93774, 93775, 93776
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00155

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 (87656,87670,87677,87684,87705,87716,87717,87730,87731,90022,90024,90038,90040,90041,87654,87655,87668,87669,87675,87676,87682,87683,87703,87704,87713,87715,87727,87729,88692,88693,88739,88740,90023,90039,90055,87581,87596,87611,88150,88152,88792,87657,87671,87678,87685,87706,87719,87733,88696,88743,88146,88589,84244,84243,88585,84242,88584,88907,88908,88905,88906,88910,88909,92913,92914,92915,92916,92917,92918,92919,92920,92921,93753,93754,93755,93756,93757,93758,93759,93760,93761,93762,93763,93764,93765,93766,93767,93768,93769,93770,93771,93772,93773,93774,93775,93776)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}