SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    60751, 65529, 64869, 65649, 60735, 65590, 
    64943, 64339, 65467, 65558, 63128, 
    65686
  )

Query time 0.00055

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": 12,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (60751,65529,64869,65649,60735,65590,64943,64339,65467,65558,63128,65686)"
    }
  }
}

Result