Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '45e1110dec799c038cbcacbbaefaf3c1dceb82da5d5963ea92929b8dcfb2bf25' 
  AND token = '25GXEj362oxlXNKDbnszQZ74iSs9wLjGFygTq6b0zFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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