Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e110d2a38ab68aecb081099cb8da915fb9e1278d520bd471237d8d6f1e0721f' 
  AND token = 'S1NkOoulB0Ba190u106cFBJZPJDd7XhJ/Lys0jhj150=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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