Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abcdd76326d6813a3147a33f7d75a320f51a6d7faedee41932db296958f1541a' 
  AND token = 'CVHPvK0JhCF39v8vtaXoZBoakC/+85eoW1kOOG1tQow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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