Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15159f75add6e2de1a17f3e5a922a29a036e303d440bf056440559d2f59ce1a0' 
  AND token = 'WKbXVu0Rmq6l5dIuP/qDt7pEgE4SsU4Zwi5n0yX9yRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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