AvgCPUTime = 136722 -- Mathematical average cpu time (in miliseconds) it took per query execution.

execution_count = 25, -- Total count of executions of the query.

I bet when you look at the dmvs for your wait tasks and waiting tasks, you'll see a lot of CXPACKET waits (indicative of CPU waits) and you'll also notice a lot of query timeouts et all with that query during peak period.