function edd_cleanup_stats_transients() {
  global $wpdb;

  if ( defined( 'WP_SETUP_CONFIG' ) ) {
    return;
  }

  if ( defined( 'WP_INSTALLING' ) ) {
    return;
  }

  $now        = current_time( 'timestamp' );
  $transients = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE option_name LIKE '%\_transient_timeout\_edd\_stats\_%' AND option_value+0 < $now LIMIT 0, 200;" );
  $to_delete  = array();

  if( ! empty( $transients ) ) {

    foreach( $transients as $transient ) {

      $to_delete[] = $transient->option_name;
      $to_delete[] = str_replace( '_timeout', '', $transient->option_name );

    }

  }

  if ( ! empty( $to_delete ) ) {

    $option_names = implode( "','", $to_delete );
    $wpdb->query( "DELETE FROM $wpdb->options WHERE option_name IN ('$option_names')"  );

  }

}