Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab2a347e375126a9500df991465e64d145b22b0cfd752a94d8630fc8a74b4cf0' 
  AND token = 'q9UG1ndKx0suHVIWzAM082toubDbr3DLcla9wl+D1uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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