SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'bb9b2c3a379d87982472ebfd11288fd4e9518f75a00333170cf9b998fa7efdca' 
  AND token = 'UXKvszrK+7kF/5hRAIvO8CFQ00Y1rUSVitsW/9uiZk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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