Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa79021914dd2c9bdbd857919dda337ba546ef33d46bb10d209d225974c81609' 
  AND token = 'ULv3Tl14mpN0WGel1zEQdbf3pWYA0zplAS5HAtF4/Vk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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