Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd04dfe3f89a82c20437693f678940e289b03511d8ea71c0bdda2298fde38f0a6' 
  AND token = 'XZaUyY1ES8YAFbL4NlqS45MtYMmcbdE1SsbxzdOz574=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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