Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7c295f3df81823cc3814bd749afa49a62ee8fc9962733e472e3c962c11ac1fd' 
  AND token = 'PbXvINgxIH8giPuC+TkSM1TnUlNoLteyU3NagM2neKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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