SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    11255, 12822, 11253, 12824, 10731, 11389, 
    7661, 9551, 12820, 10896, 8305, 6900, 
    9504, 11256, 12821, 11254, 11252, 12823, 
    7080, 6893, 6894, 6895, 6896, 6897
  )

Query time 0.00072

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 (11255,12822,11253,12824,10731,11389,7661,9551,12820,10896,8305,6900,9504,11256,12821,11254,11252,12823,7080,6893,6894,6895,6896,6897)"
        }
      }
    ]
  }
}