Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc16b3c30ea51a5e9d68ec131b148c23924c3d2988ecb1271763c656e81b2492' 
  AND token = '3qXOIe7iKyVxuAzu1y4ieD5ODSkZVqaEbEohnYjImQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}