Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bfb82d5c9b3c459e503575ced8ba3705fa8e2b44e76c1632973818866b7a5de' 
  AND token = 'EW/kqaXis8S6Po3wphPaQ43xWbVs/H1ZQkPyjjpIR/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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