Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fcf3aa3ae251c0576e6afb55e5edbeb0e5773267a8b6f5b1a7727ffe00db482' 
  AND token = 'io0EjPZ9sjtDfF6ADA/v+G5AKJUOBHDp0DFGyiZmqic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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