Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f405872bddd3e3c4b3db9ebcecbc23842b8da3d98d60159636e0780de7772f' 
  AND token = 'fyf0NSqJTJ8YbpDXMLBiyFa8ke5pnRc8wglVgrka0nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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