SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    15734, 15735, 15736, 15737, 15738, 15739, 
    15740, 15747, 15748, 15753, 15754, 
    15755, 15756, 16338, 16339, 16340, 
    16344, 16345, 16348, 16349, 16350, 
    16351, 16352, 16353
  )

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.04252208,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 24,
          "cost": 0.04252208,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (15734,15735,15736,15737,15738,15739,15740,15747,15748,15753,15754,15755,15756,16338,16339,16340,16344,16345,16348,16349,16350,16351,16352,16353)"
        }
      }
    ]
  }
}