Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6549149950fb06e1c085c92ce71ed234f14200bac1825857cf41c3c87e55b46d' 
  AND token = 'Dn+tKPCdCEXqQ9k5MQ5anhaPvjVTIsK1KZojnWsXJSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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