Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2a507413a4f01fc5c8bcfeeb65f2966c207ef13d91d68f8cb7d5afd420f2806a' 
  AND token = 'AbAVgCgRgnTL8K+hWed6BxjGU1imfIiiSX45rfc6UK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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