SELECT p.gid,
       CASE
          WHEN ST_Intersects(ST_Buffer((p.geom::geography),2),pr.geom::geography)='true' THEN TRUE
          ELSE FALSE
       END
FROM points p
JOIN protected_lines pr
ON ST_Intersects(ST_Buffer((p.geom::geography),2),pr.geom::geography)
WHERE p.gid=3905591;