Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4426a0092f95ccd8542de86e7b69056eba6b521daece3671fe9842e9dba992d3' 
  AND token = 'KSGqDdVzQNkmk8lAPuc1a6dnijKe13LCVAmBHuETVrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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