SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    13445, 13473, 13446, 13474, 13447, 13475, 
    13448, 13476, 13449, 13477, 13450, 
    13478, 13899, 13900, 13901, 13919, 
    13920, 13963, 13964, 13965, 13966, 
    13967, 13968, 14140, 14141, 18508, 
    18509, 18510, 18511, 18513, 18514, 
    18515, 18516, 18517, 18518, 18519
  )

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.06338756,
    "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": 36,
          "cost": 0.06338756,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (13445,13473,13446,13474,13447,13475,13448,13476,13449,13477,13450,13478,13899,13900,13901,13919,13920,13963,13964,13965,13966,13967,13968,14140,14141,18508,18509,18510,18511,18513,18514,18515,18516,18517,18518,18519)"
        }
      }
    ]
  }
}