SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '289caa67bd1510104396e36a7ae8bf7eb0fadbcf4e82d163ddebd1446d825517' 
  AND token = 'P7xWp/CLdI4ZKpyF+G53oqvHa+IpvLp9gzPo/b0buRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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