Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd034833d8c501f53cb7503453f9916845fa115b1eb82794d772d7f3bf72589' 
  AND token = 'keHgpDACOTaEdE6VMWPlET7cWtEYulxp6NSxFM8o0EI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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