Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40bb565568d82b959b34bb3da8663a5391ece7ab692fd9909fc5deb1113a4bea' 
  AND token = 'fNO46E70EHlVFeo1gjvkNN9+mQDIZZGeg+3uCqUGTtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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