Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2711ba15c120c4b5e0eceec7eb375d5e7b64ae57dcf388f3874755ac744ed3eb' 
  AND token = 'DXa8a4gZ+uMGg1Wq4K6iFIxF5anJOvm7SljZcLub43M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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