SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10674, 10675, 10676, 10677, 10678, 10679, 
    10680, 10681, 10682, 10683, 10684, 
    10685, 10686, 10607, 10608, 10609
  )

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 16,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10674,10675,10676,10677,10678,10679,10680,10681,10682,10683,10684,10685,10686,10607,10608,10609)"
    }
  }
}