Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b3d9249b0f160e567f7df7407aa33eb64809a65b9020c08ac68096a73b6240f' 
  AND token = '+mnGzX2u5+pCHzBavtAut0liSx+hBLdxwQnxxPT5E9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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