Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77379239427e9bfe4d0d442a8be29571423889817f7c0d1b7e3efc5eb7af4172' 
  AND token = 'ouySVslNUymVyj9TmaAzY1wa87tmE4+E2AUh58L55Wo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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