Can I export token through features
No - at this point it is not possible to export tokens using the custom tokens module. There is an open issue here on Drupal.org referring to this that has been waiting for a while without response and its unlikely the module maintainers will add this functionality as this is meant as a simple solution for developers who don't want to create their own tokens in PHP. 

Depending on the complexity of your token operation, the best option might be to either manually sync up the two environments or to create your own custom token function following the instructions here (or other guides on the web). I would encourage you to try writing your own export functionality, its easier than it would seem and will open up more possibilities for you on future projects.