wp_query with types checkboxes

Hello

I try to make a wp_query with types checkboxes in an ajax request by doing this

on the front I load the checkboxes in a form :

function get_cb(){

	$output = "";
	$cb = get_option('wpcf-fields');
	$unz = $sptes['my_checkboxes']['data']['options'];

	foreach($unz as $k => $v1)
	{
		if (isset($v1['title'])) {
    		$output .= "<input name='my_cbs' type='checkboxes' value='".$v1['set_value']."'>".$v1['title'];
		}
	}
	echo json_encode($output);
	die;
}

Once the form is submitted, I want to compare selected checkboxes with database :

function compare(){

   $checkboxes= $_REQUEST['my_cbs'];
   $output = "<h2>Résults :</h2>";

	$args = array(
		'post_type' => 'my_custom_post_type',
		'posts_per_page' =>10,
		'meta_query' => array(
			'relation' => 'AND'
			)
		);
		$args['meta_query'][] = array('key' => 'wpcf-my_checkboxes' , 'value' => $equipements, 'compare' => 'IN');

	$query = new WP_Query( $args );
}

So it does’nt work. someone could guide me ?
Thanks a lot

https://ww.wp.xz.cn/plugins/types/