Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de00410523091a3c2cf3528f46f624b6887184294a761fa10bd9578e7862ae4d' 
  AND token = '87DCIVhu6O+zPxW8tpisP3cwyOInvB0C4xi6RkQ0f+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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