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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    5485, 5479, 5420, 5518, 5441, 5434, 5590, 
    5417, 5541, 5406, 5407, 5493, 5526, 
    5484, 5412, 5583, 5680, 5416, 5482, 
    5544, 5589, 5600, 5487, 5418, 5421, 
    5499, 5521, 5532, 5597, 5455, 5512, 
    5560, 5562, 5588, 5669, 5525, 5679, 
    5533, 5974, 5579, 5584, 5481, 5489, 
    5428, 5524, 5591, 5511, 5419, 5495, 
    5423, 5424, 5480, 5486, 5657, 5546, 
    5543, 5440, 5547, 5548, 9547, 5438, 
    5443, 5476, 5542, 5592, 5585, 5649, 
    5447, 5529, 5439, 5659, 5602, 5496, 
    5656, 5475, 5433, 5498, 5603, 5432, 
    5514
  ) 
  AND cscart_product_descriptions.lang_code = 'ar'

Query time 0.00301

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "56.65"
    },
    "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": 80,
      "rows_produced_per_join": 80,
      "filtered": "100.00",
      "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`product_id` in (5485,5479,5420,5518,5441,5434,5590,5417,5541,5406,5407,5493,5526,5484,5412,5583,5680,5416,5482,5544,5589,5600,5487,5418,5421,5499,5521,5532,5597,5455,5512,5560,5562,5588,5669,5525,5679,5533,5974,5579,5584,5481,5489,5428,5524,5591,5511,5419,5495,5423,5424,5480,5486,5657,5546,5543,5440,5547,5548,9547,5438,5443,5476,5542,5592,5585,5649,5447,5529,5439,5659,5602,5496,5656,5475,5433,5498,5603,5432,5514)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`lang_code` = 'ar'))",
      "cost_info": {
        "read_cost": "48.65",
        "eval_cost": "8.00",
        "prefix_cost": "56.65",
        "data_read_per_join": "365K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ]
    }
  }
}