SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a805f2c6937d29fe4cd0580be041876149ab53bce9bfe939143174c4b56e9bcd' 
  AND token = 'V3rlNkq3/SABbs7XPrMwhNaYkAxNJCYHmTTFv1gZX4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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