Combine two active_callbacks into one on theme customizer

Maybe I’m misreading your question, but combining these two conditions in one anonymous function doesn’t look that difficult:

'active_callback' => function() use ( $wp_customize ) {
    $condition1 == $wp_customize->get_setting( 'twsa_show_schedule' )->value();
    $condition2 == $wp_customize->get_setting( 'twsa_show_active' )->value();
    return ($condition1 && $condition2); 
    }

For really smart thinking on active callbacks, read Otto’s take on them.