Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77f4a05eb2cc1982e38ba14d6e878103ccc907edc84e59b7ecad00f744cd56c7' 
  AND token = 'rKemwIKe5QpTAW6FmbZDi3WUfaZe/QH0TegI8wPJ0fI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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