SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067e9162295eb2e36787e720c96784d2116c6144484457fa068481bae617b903' 
  AND token = 'owmzmjRmHJCbViBojYNbGxN0Wcnra5XOgTWpHszhtwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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