Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '639ddc26fed3c21ba5b4ee8adcd944358fecad7251990d0d72cf3f504f2a8082' 
  AND token = 'ojbTdrOt6Hy2BJU89gSOiM0GNijIeKG8xil4enMSsZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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