MySQL 8.0

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CREATE TABLE users
    (`id` varchar(5), `name` varchar(5), `longitude` varchar(11), `latitude` varchar(11))
;
    
INSERT INTO users
    (`id`, `name`, `longitude`, `latitude`)
VALUES
    ('1', 'Mark', '-76.316528', '40.036027'),
    ('2', 'John', '-95.995102', '41.25716'),
    ('3', 'Paul', '-82.337036', '29.645095'),
    ('4', 'Dave', '-82.337036', '29.645095'),
    ('5', 'Chris', '-76.316528', '40.036027'),
    ('6', 'Manny', '-82.338036', '29.645095'),
    ('7', 'Fred', '-82.338036', '29.646095')
;

Records: 7  Duplicates: 0  Warnings: 0


CREATE TABLE matches
    (`id` int, `sender` int, `receiver` int, `status` int)
;
    
INSERT INTO matches
    (`id`, `sender`, `receiver`, `status`)
VALUES
    (1, 3, 4, 0),
    (2, 1, 5, 1),
    (3, 6, 3, 1)
;

Records: 3  Duplicates: 0  Warnings: 0


SELECT 
  id
  , ( 3959 * acos( cos( radians(37) ) * cos( radians( latitude ) ) 
     * cos( radians( longitude ) 
     - radians(-122) ) + sin( radians(37) ) 
     * sin(radians(latitude)) ) ) AS distance 
FROM
    users
HAVING distance < 50 
ORDER BY distance 
DESC LIMIT 20


id
distance


SELECT
a.id
,a.distance
FROM
  (Select  
       id,
       st_distance_sphere(POINT(-82.337036, 29.645095 ), POINT(`longitude`, `latitude` ))/1000  as distance
    FROM
        users u  
    WHERE id <> 3 
    HAVING distance < 50 
    ORDER BY distance 
    DESC LIMIT 20) a
WHERE
    a.id in (SELECT `sender` FROM matches WHERE status = 1)
    OR a.id NOT IN ( SELECT `sender` FROM matches UNION ALL SELECT `receiver` FROM matches )
ORDEr BY a.distance ASC


id
distance


6
0.09663995445895139

7
0.14732089261518266