woocommerce_order_itemmeta
query to get all product with meta key ‘ Personalzacion’
$meta_query = array( 'relation' => 'AND', array( 'key' => 'meta_key', 'value' => ''_product_id'', 'compare' => '=', 'type' => 'CHAR', ), array( 'key' => 'meta_value', 'value' => '14', 'compare' => '=', 'type' => 'CHAR', ), );