Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fb36c74c74d6671c33f15b157bd3b587b89f0d7c773937bc75a85caa3204b6' 
  AND token = 'wSqWkeZ2Zk79oZ/dMleQ0aaPSaIkg4ySo2E5A181fr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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