Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bad4ca419ccc38d2420d82833059eb734db3ff3c4fe6be95d6bc7fc5740edbe' 
  AND token = 'MrU+y5m1HcV9Dh/duYLIRAKwysG5YTMGbWRK/3DJSdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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