Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4beeaaf1a66e47082577fea9abf9b15a6e597dffa4f5b9a878c45a8f9f0e5f05' 
  AND token = 'kaNtfDKJBE2irOllPm/jqc4T/TmpB3Dq6zJjr7jzXnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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