Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ff1fd7853f1ec46a0b054485602aee21aa98f6d1dfc53c7732ce4b9ce7df0f5' 
  AND token = '8X7aZiM9JkgUD2qqxLH3O1O3/8Rs8x+LyZVX70FZ46I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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