Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45000fed7d0968d4ce07ae5539e88266b6a61c32cc48b86e68a3ccd368c44c82' 
  AND token = 'pUBwr5PXbg0il/e+tTl4owyeHD04HpMfMj1YwuVz8y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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