Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6795e65c7f65f7c924e59a20db02f158fa05ef9a7d59baf5dbf4ee2b674c1f26' 
  AND token = 'kRVeHta5R8M9Vj06W9Nc6KtXdA2nOU+XGvEZ4b8AAqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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