Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5df2d13032383a94d0b6cfbe0b4d46b4d30edbe84f0a9d98eaaf2bf84bba95e' 
  AND token = 'WWixGo5a95JXNbMB7E9cke2x0NgoUF7fhjOQn8dCQyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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