For 5V this would be 100mA which may indeed burn the sensor if it expects 7mA only.
No power doesn't work like that, it is the product of voltage and current.
Power = Voltage X Current
so at the current at 5V would need to be:-
Current = Power / Voltage = 0.5 / 5 = 100mA so that means 100mA is OK
BUT if you connect 5V across 10K the current flowing is 0.5mA which is a long way from 100mA
Anyway the data sheet says 1W not 0.5W so it is even less of an issue.