How to Get Your Own Post Type in WordPress by Filtering by the Right Taxonomy

To retrieve a specific post type in WordPress filtered by a custom (or built-in) taxonomy, use the following snippet:

$Posts = get_posts(array(
	'post_type' => 'my-post-type',
	'order' => 'ASC',
	'tax_query' => array(
	array(
			'taxonomy' => 'my-taxonomy',
			'field' => 'slug',
			'terms' => 'event'
		)
	),
	'meta_query' => array(
		'AND',
		array(
			'type' => 'NUMERIC',
			'key' => 'event_date',
			'compare' => '<', 'value' => time()
		),
		array(
			'type' => 'NUMERIC',
			'key' => 'is_archive',
			'compare' => '==',
			'value' => 0
		)
	)
));

What do we have here? First:

	'post_type' => 'my-post-type',
	'order' => 'ASC',

we query the database for posts of type "my-post-type".

Second:

	'tax_query' => array(
	array(
			'taxonomy' => 'my-taxonomy',
			'field' => 'slug',
			'terms' => 'event'
		)
	),

in the same query, we add a filter for taxonomy "my-taxonomy", where the slug equals "event".

Third:

	'meta_query' => array(
		'AND',
		array(
			'type' => 'NUMERIC',
			'key' => 'event_date',
			'compare' => '<', 'value' => time()
		),
		array(
			'type' => 'NUMERIC',
			'key' => 'is_archive',
			'compare' => '==',
			'value' => 0
		)
	)

We add meta field filtering: the event date "event_date" must be less than the current date, and the post must not be archived:

'is_archive == 0'