Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbc271d54aaa217626e64a7d021d139e8275afb0d2dacbda879c8e4f560f12c' 
  AND token = 'HXPVbpI+v96oOJLYmmIDcnnwlAKdKZYXFu6P37LXXHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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