Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4373641e63e96ac00298a9b75899e2946c5b3082685058c87c099120208a1cec' 
  AND token = 'pdKCH1H7MsHpZN5PUrftbLcIASGCBkCh7NvxpPqpS0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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