Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd009ef14daabb4d82113e03ada432d153df3070e94c715dd5a75e7331bfff66d' 
  AND token = 'vTKNKC61GCFjrRWu3NVXFHHkUGVVKfxQuIEz5b7YVho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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