Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e49bb797be507c97c28335d6e4304bccd61313dee997df15b44c45d83adb1448' 
  AND token = 'Huq7yaMQGEzURMpp2wOnxqXX8Xo3J+Wlb9qXLU6+XbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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