Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9784bfc109d8186874ec8157ecd2f51643c9fba8c100ec81bf30b3c19088ae2' 
  AND token = 'WkSqJJ1guhMvhGOkIWJhCb8/wVwcJvHyepuQMnHyxBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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