Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0f7772c2531a7f794c97ab402f1d498538df314a4acc1abca414dd2dc2ff58a' 
  AND token = '/lZ6vd0eMRcUv18RSKarnKQiypunHAVIXYQhX3bFvig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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