Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c35b83b563e32877d046e7c89222631032e5251279b55ca47445ce9ed74e5ac5' 
  AND token = 'NIf4j+WK+dRPDERkeyf7/Ztv/BAvyCW2x0+MNRtfsw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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