[{"collection":"collection","count":100,"content":{"_id":{"type":"autoincrement","autoType":"int"},"x":{"type":"int","minInt":0,"maxInt":50},"y":{"type":"int","minInt":0,"maxInt":50}},"indexes":[{"name":"x_1","key":{"x":1}},{"name":"y_1","key":{"y":1}},{"name":"x_1_y_1","key":{"x":1,"y":1}},{"name":"y_1_x_1","key":{"y":1,"x":1}}]}]

db.collection.find({"x":20,"y":32}).explain("allPlansExecution")