Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66f9aa3129826bb83f1aa84ac796a2f63679d6e749eb406b71b0eb330ec4468d' 
  AND token = '1WkK0QoiBMZB6CAGIBR18XXpqiEYUdxcJ5P8gFhyiA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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