Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77648430511a8b18772837bbc5742ce4a0a7bd2beabe6e91da4d950d96bd9d85' 
  AND token = 'Eg8HzF27eXoC4cDnff5aK6Jml+ExOoDTJlu1Jxg+Z7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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