Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79af42cfcfc96f20f820d910eebac3fa135431c1fddf0deee3db34fd89cef192' 
  AND token = 'kgiXcCDh4OwjxCn0o1nC7W+0G952Mh+mJcaXVCHI558=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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