Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9309acda60a41b2eda0ed19d8fc1b4e61563ea1f13d58a11785341e578159465' 
  AND token = 'R+4s6SMYF/MclpJDlv+zE1HUwHBQVpUp0kzQiWkjP3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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