SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1cb2d96cf0c017310ffb704c868c3ed802af161740527ee40a57a88f89b25e08' 
  AND token = 'sb3CUg6DYvsO4zDlGIcNDIEKlO/ktOkRcVxCSu+Bboo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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