Index: site/wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 16488)
+++ wp-admin/includes/schema.php	(working copy)
@@ -146,6 +146,8 @@
   PRIMARY KEY  (ID),
   KEY post_name (post_name),
   KEY type_status_date (post_type,post_status,post_date,ID),
+  KEY type_status_date_no_id (post_type,post_status,post_date_gmt),
+  KEY type_status_modified (post_type,post_status,post_modified_gmt),
   KEY post_parent (post_parent),
   KEY post_author (post_author)
 ) $charset_collate;