Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5638910db4da2a3e96ec69c0f8e4516a64e9e98bb11fbbd2ab8c1a183a018ad' 
  AND token = '0XZQ4FbqOswQ3gxdaPYrPVer9LNM2zqilKUNce4dSN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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