Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59f9158b35413c36c7d7e2b5454aaa8053a3a2433bc50c65fa5f08dbf02da0bf' 
  AND token = 'y5lEvhKrgO9hMGtPHwK1eXaTbcEu6t/vDzqwge6EUt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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