Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad4eb435a84de3ac6c94985e5c85622cc38e42e4fb72cc0119ea614e996b5ca' 
  AND token = 'cXEm8mC34mIzkcEklxk1CdeNI3lM2PzOeMwrNtQz7v8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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