SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4eccbbb41d4f3fd47698695e579c3f285825167c49ac7baf46f74632edb9677d' 
  AND token = 'ZkcSTsMno6OZ+XSi1UfPcH3xJ4L73K0Dwfu9rVhKPv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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