Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '163c80b9b808d9973f71c7c5a4a937a85ffb6b979fb08f0749492736a03f8323' 
  AND token = 'bHOFOcOs9VxMNm8EYkBMjYBDd7FASHfW3+ixEslX6bI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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