Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1edfa814fe72707c15d72d59589d5368839a6b084981120634e4560e7fea566' 
  AND token = 'oPdRayBdJEpBpwj7f5LD7CUc9gK0rJofOm8+uW/8YSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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