If you look at the execution plan for that query, do you see an index scan or an index seek for the table INFO_LOG?
Edit: Looked a little closer
That's a rather non-optimal clustered index. Recommendations are that clustering keys are kept narrow. Offhand suggestion, make the PK non-clustered and put the clustered index somewhere else
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability