Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd10a5fd2f062234e94b78f10e44186ac3b539fbd13124bc6b47b7c41d0ca219' 
  AND token = 'SKubHYp2udAQc3XzQQyC3md4GDRedKtJB1nzk2z6W/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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