SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6695bbc4f908ed1a641c33952a254f241680ad51336905e656e9f578534f76dd' 
  AND token = 'DLmfDXvutzt6sw96w8GOaoIO8zrBVbT+XO+0TGJjVKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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