Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b45151110887e23c3d632cd7c2051435a8af110f49ea40e74401dd32ce9ea5b6' 
  AND token = 's0BdKVnbHXUzH01geXGscbNIX7CfPj2ctRi8DzrpyUI=' 
  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"
    }
  }
}