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 (
    94761, 94762, 94763, 94764, 94765, 94816, 
    94950, 94951, 95565, 95566, 95567, 
    95568, 95569, 95570, 95571, 95572, 
    95573, 95574, 95575, 95576, 95577, 
    95578, 95579, 95580, 95581, 95582, 
    95583, 95584, 95585, 95586, 95587, 
    95588, 95589, 95590, 95591, 95629, 
    95630, 95631, 95632, 95633, 95634, 
    95635, 95636, 95637, 95639, 95641, 
    95642, 95643, 95644, 95647, 95648, 
    95649, 95650, 95651, 95652, 95654, 
    95934, 95935, 95937, 95938, 95939, 
    95941, 95942, 95943, 96206, 96207, 
    96208, 96341, 96342, 96343, 96344, 
    96345, 96346, 96347, 96348, 96601, 
    96602, 96603, 96604, 96605, 96606, 
    96607, 96608, 96609, 96610, 96611, 
    96612, 96613, 96614, 96615, 96616, 
    96617, 96618, 96619, 96620, 96621
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00168

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 (94761,94762,94763,94764,94765,94816,94950,94951,95565,95566,95567,95568,95569,95570,95571,95572,95573,95574,95575,95576,95577,95578,95579,95580,95581,95582,95583,95584,95585,95586,95587,95588,95589,95590,95591,95629,95630,95631,95632,95633,95634,95635,95636,95637,95639,95641,95642,95643,95644,95647,95648,95649,95650,95651,95652,95654,95934,95935,95937,95938,95939,95941,95942,95943,96206,96207,96208,96341,96342,96343,96344,96345,96346,96347,96348,96601,96602,96603,96604,96605,96606,96607,96608,96609,96610,96611,96612,96613,96614,96615,96616,96617,96618,96619,96620,96621)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}