Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c2a22fd65559a57bcd1d7f9b6c52db5e0ce1d473aad9afb10f38310fd1e8fbe' 
  AND token = 'D5m/CKwbnmRWFhtV/EIoxzZfw8I39KcUfHpugRdu+Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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