Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb456f6ae98a03a7a4054f641e3a10dd1fe60362114049c757f7a354b3840348' 
  AND token = '3cpCsfSjdAfT55WdASWuijGRuEI8ZfryFIs7JT/WPrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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