Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '664ab8b425d655b17ef08901ce896fab52a988cfa8aef78588225a723619521f' 
  AND token = 'DAVvL/ajf6vhdnBMsVNOVbZjaL/0NZczN7129DCiLpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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