Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99dd71461bb4eaeb2369500c37140e97fab0fa2cf332105a9558f86d9d13c9c9' 
  AND token = 'wbhAqm7MlVsjUp935gmmzvd36Dg0U05mwlxC20ZSN0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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