Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '478097f8f44917203ebe7625d17cc9fa27f2df3aa054cae7d8fe97617d9ece66' 
  AND token = 'GvLOS5bicPDlMdm5qj4dG2jgpDRFNCzjsnM9WqSvpD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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