Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65579ecfa7079b729ee88400f62fddd0ed59ab8fa3d190d8135ca569f931e960' 
  AND token = 'JbLNKPefkK6wYfbNTG3p+plWzNg12jz+d22ERPYvbxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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