Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc49a72e81f4fc546bd2d313ce52bb9846fc6c8b3817f7dad38665f10ff90743' 
  AND token = 'Z0Zk8kcdARdDsVDx21mJTWhR4w49ctrzOcjEo0DzpIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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