The speed of light is .3km/sec

I think you are confusing the speed of light with the speed of sound (in air at sea level). 0.3km/s is Mach 1.

so in 80ms, you should be able to do a round trip of 24km.

Even if it were 0.3km/s, in 80ms it would only go 24m, not 24km. Fortunately, light speed is much, much faster than that at 2.99x10⁸m/s. This is how I can get round-trip pings across the Atlantic Ocean in 80ms and how I know it is a rubbish ping time for a LAN.

The point about using DBI->trace is well made, though. I'd also add that a check of the slow query log might be instructive.