Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2b5ddabb62ef2ad1510f727fdafde3036dcb49646d7eba18dd02f9dcfe87c27' 
  AND token = 'DC+g9BEVAmDfU5khzW7gSMSTss4hehKv5bKhKhs8FaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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