Admin search meta key

add_filter( 'rwmb_meta_boxes', 'your_prefix_meta_boxes' );

function your_prefix_meta_boxes( $meta_boxes ) {
	$meta_boxes[] = array(
		'title'  => __( '商品資訊', 'your-prefix' ),
		'post_types' => array( 'catalog'),		
		'fields' => array(
			array(
				'name'        => __( '產品編號', 'your-prefix' ),
				'id'          => 'product_code',
				'type'        => 'text',
				 'admin_columns' => true,
			),
			array(
				'name'        => __( '選擇商品第一張圖', 'your-prefix' ),
				'id'          => 'product_one_pic',
				'type'        => 'file_input',
				'admin_columns' => true,
			),
			array(
			    'name'        => __( '選擇商品其他圖片', 'your-prefix' ),
				'id'          => 'product_two_pic',
				'type'        => 'image_advanced',
				'admin_columns' => true,
			),
			array(
				'name'        => __( '摘要', 'your-prefix' ),
				'id'          => 'product_show_desc',
				'type'        => 'textarea',
			),
			array(
				'name'        => __( '內頁描述', 'your-prefix' ),
				'id'          => 'product_show_content',
				'type'        => 'wysiwyg',
			),
		),
	);

I need wp-admin search the meta-key about "product_code" ,how to do?