Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64eaf9729d8d0eecea0a835ac59bad426477a526b13104583a4e156dc0bdc247' 
  AND token = 'XgIr1muJ76InjYOIhfN2KX68dZp7adr35ILyPm/hXwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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