Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc626bded0fcb17fb505de232b03fe57adf9fab9d9974912da96899d8cc6e7d6' 
  AND token = 'EDbvWIdyGVLaQlHu9qvvfp0n4jqKUE5UN9UD42qr+e8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}