Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bc35b46b6a4dd01f862de13d9b40b5fcc812822766aafeba4c2b4c7fe609c02' 
  AND token = '8wlyxCsh+nzn5mdwWnMzuC+lyAe4mjaPwNql5njRuXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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