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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '884efba4aa35cbdb3ba007ead3a01e2621f49363c3956a8ef3121aecb7ca0e3b' 
  AND token = '2mpdPvZ2irVVX4Kf5+DdM0MtLk7eiwqLS2F7hu5Ru3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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