Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41eaa5d21a42d3394283604eefbfeccba4e88f9aa471401e170d8e960ad39483' 
  AND token = 'WJMjym1TVSgQr9/YWG3z857t4Un2GCdj0AHBiiso4IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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