Hammer at low altitude has a range of just 11 km, so it was a seriously risky mission.
MAWS has rearview. We can see that from open-source images. I mean, if you can see the sensor with your eyes, then it can see you as well. The only blindspots will be from angles where you cannot see the sensor at all.
And PL-15 uses Ku band (12-18 GHz), not Ka (27-40 GHz). Seekers for AAMs are typically in the 15-16 GHz range. Ka band is what we call MMW and is used in ATGMs and AGMs, where range isn't a priority but resolution is. Some dual-mode AAMs can use Ka band for fine resolution, but as a secondary sensor to say, an IIR missile, like the Stunner with its dolphin nose, it uses IIR and a 35 GHz MMW seeker.
Otoh, MKI lacks MAWS. Maybe a podded MAWS was used during the operation, but it's not yet a standard fit today.