Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13c7c9674f084dbadba5644073f9e8c34b6539602b93ee4638c7485f586ab9aa' 
  AND token = 'fWeJnLLJ7cxg/OjIv1JBrLkF7UOByEZaTDn+FJaMg54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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