SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130db0777f6dfede9af0df04fcc7a3d23e5915938cb61921a68bb6dd1d545a24' 
  AND token = 'ux1dpn2gJjIZUNC+L9M7wckz6CjrvEJPmBJaMB9V6yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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