Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94228a988d2ece810955967673cbb6261cd1fb44e0dd11ba013ab5a3bb0ea812' 
  AND token = 'RYinJDPou6JZHA/tjFmNeb5XWI0h3EZB9IteI5vr+94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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