Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09486f9470581506c7a7c5d93d1442e6c0eb12e54ceb192e206bc3deda2a26ed' 
  AND token = '3yqjc8X6zCMrEnWSkPfZfzn1MT5zhH6fj5qSj4jQXYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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