What is Chitwood's lowest completed number of laps with a qualifying time of 124.619?
CREATE TABLE "indy_500_results" (
  "year" text,
  "start" text,
  "qual" text,
  "rank" text,
  "finish" text,
  "laps" real
);
SELECT MIN("laps") FROM "indy_500_results" WHERE "qual"='124.619';