Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0d39cc09b83d04748167b13301cb3e49e379f3a8b5b6ee91084a1523ad73a70' 
  AND token = '47wYH1i9GEeXC4wgd/D1mDLLelvd83sfUba7HLWl71M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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