ST_Contains

select group_city, 
       ST_AsText(location) AS locationString,  
       ST_Contains(
         ST_GeomFromText('POLYGON ((
             -74.171737 40.607377, 
             -74.089339 40.753180, 
             -73.911498 40.769303, 
             -74.016555 40.604249,  
             -74.171737 40.607377))'),
	       toGeometry(location)
	     ) AS inPolygon
from meetupRsvp 
order by inPolygon DESC
limit 5

select count(*)
from meetupRsvp
WHERE ST_Contains(
         ST_GeomFromText('POLYGON ((
             -74.171737 40.607377, 
             -74.089339 40.753180, 
             -73.911498 40.769303, 
             -74.016555 40.604249,  
             -74.171737 40.607377))'),
	       toGeometry(location)
	     ) = 1

select count(*)
from meetupRsvp
WHERE ST_Contains(
         ST_GeogFromText('POLYGON ((
             -74.171737 40.607377, 
             -74.089339 40.753180, 
             -73.911498 40.769303, 
             -74.016555 40.604249,  
             -74.171737 40.607377))'), 
          location ) = 1

SET explainAskingServers=true;
explain plan for
SELECT event_id
FROM meetupRsvp
WHERE ST_Contains(
         ST_GeogFromText('POLYGON ((
             -74.171737 40.607377,
             -74.089339 40.753180,
             -73.911498 40.769303,
             -74.016555 40.604249,
             -74.171737 40.607377))'), location) = 1
limit 1000

Project(columns=[[event_id]])
   DocIdSet(maxDocs=[10000])
      InclusionFilterH3Index(predicate=[stcontains('84000000010000000500000000c0528afdbd2fa0d740444dbe878fabdac05285b7baecd0784044606833c6002ac0527a55fbb517a440446278854cdb7bc052810f3cb3e57540444d5807fed203c0528afdbd2fa0d740444dbe878fabda',location) = '1'], operator=[EQ])