Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79c18e71ad5b1ef409ac0091dffc45b67094cd3b72aebd4393959e869f3d287f' 
  AND token = 'remye0KvdDLvdKhErMDI4kR5ggr7nQL3rffeTbZZu8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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