Android markers in a distance radius

I have a query, I have a Json with addresses of locations such as banks, stores, etc.

I want to show those markers on the map as I move, that is, within a radius of 200 meters.

I already have my List and I go through them with a foreach, for now I show them all, in the whole map, but if I had thousands, I would see it inefficient.

I enclose the code to generate the circular radius.

public class MapDrawer {

private GoogleMap map;
private static int EARTH_RADIUS = 6371000;

public MapDrawer(GoogleMap map) {
    this.map = map;
}

private LatLng getPoint(LatLng center, int radius, double angle) {
    // Get the coordinates of a circle point at the given angle
    double east = radius * Math.cos(angle);
    double north = radius * Math.sin(angle);

    double cLat = center.latitude;
    double cLng = center.longitude;
    double latRadius = EARTH_RADIUS * Math.cos(cLat / 180 * Math.PI);

    double newLat = cLat + (north / EARTH_RADIUS / Math.PI * 180);
    double newLng = cLng + (east / latRadius / Math.PI * 180);

    return new LatLng(newLat, newLng);
}

public Polygon drawCircle(LatLng center, int radius) {
    // Clear the map to remove the previous circle
    map.clear();
    // Generate the points
    List<LatLng> points = new ArrayList<LatLng>();
    int totalPonts = 30; // number of corners of the pseudo-circle
    for (int i = 0; i < totalPonts; i++) {
        points.add(getPoint(center, radius, i*2*Math.PI/totalPonts));
    }
    // Create and return the polygon
    return map.addPolygon(new PolygonOptions().addAll(points).strokeWidth(2).strokeColor(0x700a420b));
}

public static boolean isInPoint(LatLng Point){
    for (List<LatLng> charginPoint: chargingPoints)
        if (PolyUtil.containsLocation(Point,charginPoint,false))
            return true;
    return false;
}

public static boolean isOriginOrDestinyInAirport(LatLng origin, LatLng destiny){
    return isInPoint(origin) || isInPoint(destiny);
}

}

Greetings.