Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ed65960413ad9c690f1ae0751b1722fa2936aa5ed48b94ccfa1b65471f236a4' 
  AND token = '1SHnzUeCqNjBmNBT6H3uNYe2DcQW8YhYHqi1TOTE75A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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