Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23911a229577b303fbbd5b5e90fe60fde4aa453e0da7f2bd91fa3bc70cd4f532' 
  AND token = 'x3fUwvgVDNHk8kc+c0CmG7hdWojgsrYsIK9zCU75PX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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