Has a FIBA World Cup game ever ended 90-62?
Exactly once. On February 23, 2018, Poland beat Kosovo 90-62, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 90-62 in league history.
That makes 90-62 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 91-62 has happened never and 90-63 has happened 1 times.