find by props meta
$meta_query = array( 'relation' => 'AND', array( 'key' => 'smolblog_import_key', 'value' => 'import_key', ), array( 'key' => 'smolblog_reblog', 'value' => 'reblog', ), array( 'key' => 'key', 'value' => 'value', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => 'smolblog_import_key', 'value' => 'import_key', ), array( 'key' => 'smolblog_reblog', 'value' => 'reblog', ), array( 'key' => 'key', 'value' => 'value', ), );