Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99c7013e96c9244787612b25eddb87d50f326d883c60f8d7c4e927827f52d33f' 
  AND token = 'RmhA3P7rCD4L9lJcbEl+0FkT+9jPzemNBeMLDtt25v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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