Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8ce00af989fae2eadd630375984f1824ba41f013ca244e6c9945ae6baedf640' 
  AND token = 'wQduRLxVZbHmMNg2G/p/yr746aRmOjT6lxPS+VIflPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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