SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c14eea288f602f5ddb5c5e1ccb0aa3ed91c57f08723097ccc1b434df6775336c' 
  AND token = 'PzwRJHrM+cyDhHgbYe/ZGBI48eY3X7SykSthamQlRyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}