code: public boolean hasExpired()
      {
          if ( expiresAt == null ) {
              LOGGER.debug( "hasExpired - token is not expirable" );
              return false;
          }
  
          long now = System.currentTimeMillis();
          if ( LOGGER.isDebugEnabled() ) {
              LOGGER.debug( "hasExpired? - now: {} expiredAt: {} ", new Date( now ), expiresAt );
          }
          return now > expiresAt.getTime();
      }
docs: Indicates if the access token has expired
  
  @return true if expired, false otherwise