Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a105210777a98743094ee5b29aa49ce1503c61f595d50292900df52c54fe7496' 
  AND token = 'fiKfbxLzHkSR/XmK8MX6q7V0utiSgnODa/ECKv7GRK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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