Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd33f2f7ff088ee08098669f7355733233c72d0a30aedb98926c788bbefd64c70' 
  AND token = 'O2t6SfqKc8AkwFR5ZfiKuEh/tS+NjF4g6qydfmyMdok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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