SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd447430fc13689985894aa071093ff9ba1fc24997aaed7e1a5666e4cc96720b6' 
  AND token = '7VlAHlNKqlB5TOCdjP9FHFw+CRyrWbbsYJzlvBixV/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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