SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    30238, 60599, 30237, 60600, 60598, 60597, 
    30235, 64608, 64197, 65763, 65768, 
    62034
  )

Query time 0.00079

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 (30238,60599,30237,60600,60598,60597,30235,64608,64197,65763,65768,62034)"
    }
  }
}

Result