$wpdb->get_var returns 0

Your count for that query may be 0. Make sure $wpdb->tablex is correct.

Also, definitely use $wpdb->prepare

$user_followed = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT( * ) AS total FROM {$wpdb->tablex} WHERE type = %d AND active = %d AND user_id = %d", 4, 1, $user_id ) );

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