Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea7ee43bdd21e41ef44877c00adbed65e5974e27693363242c743a1b9da6be6c' 
  AND token = 'bHuTbFfHvtvhl5o4hMrAaGqn93DibPy1RP35IJcVbZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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