You can override the Mapbox token in the Site Settings interface by specifying a Mapbox token at the visual level.
In an interactive map visual, under Settings, navigate to the Map Server menu, and enter a mapbox key for the visual in the Map key for visual text box.
This setting will override the Mapbox Token setting in the Site Settings menu.
Your organization must obtain its own credentials for Google Maps and MapBox. See Site Settings > API Keys for Interactive Map Visual.