Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76f0bf2979dffe28d2b61099cee0c4e4990004f69032716c72d958d604abbe27' 
  AND token = 'h2NYRFxnYK8RUzoDobTzqFBSiFhPHFCVl/rPVIk4Q0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}