SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    6738, 6739, 6740, 6741, 6742, 6748, 8801, 
    8802, 11103, 6744, 6745, 6746, 6747, 
    10992, 6749, 6750, 8743, 6751, 6752, 
    6753, 6754, 6755, 6756, 6757
  )

Query time 0.00069

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 24,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (6738,6739,6740,6741,6742,6748,8801,8802,11103,6744,6745,6746,6747,10992,6749,6750,8743,6751,6752,6753,6754,6755,6756,6757)"
        }
      }
    ]
  }
}