Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '030d192dea3887e271109b730d54ac8e6e2961334000892df8c55c2d39461dfe' 
  AND token = 'OkGs0frTvMBPnxj6QuejW2QsjvKzaU5ag00E9LRsKgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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