Resolved: I check the processes that were running on my RDS MySQL database while i was attempting to login the wp-admin backend and notcied the Select * from wp_ID_comment was taking along time to process. I checked and noticed 13,000 spam posts that were flagged as spam bhy akismet. So I ran a MySQL query to remove them. This cleared all the spam posts and solved my issue.
MySQL Query
DELETE from wp_ID#_comments WHERE comment_approved = 'spam";