Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fe489d11417325579e2671fcdbd3aa27e6f30b445cd6e941548ec0d92fb318f' 
  AND token = '6wP5FD7siL4DQMO8YrMH5njPEhuIM9T0jZhNR3hflv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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