postgis get geometries within a radius of meters using wgs84

select *
from zones z
where st_intersects(z.geom, st_Buffer(ST_SetSRID(ST_Point(     2.336031, 48.863172), 3857),1));

It looks like the '1' in the st_buffer is being interpreted as degrees, I need to find geometries within n meters of a given point.

I did find a reference to a new function (st_Buffer_Meters) but that didn't seem to do anything different.

Solution

The actual query that ended up working was:

 select nom
 from zones s
 where ST_DWITHIN(Geography(ST_Transform(s.geom,4326)), ST_Point($1, $2) ,$3);`

Where $1 is Longitude, $2 is Latitude and $3 is distance in meters.

In addition I changed my imported data from SRID 3857 to SRID 4326