Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2af53f1e8b978c60e8db751fbc01809288d561abf78c1342203ac63600f9fb28' 
  AND token = '8syvNApEyRhk0OLklfZ1ebTiShlcu3fb5DKceufptjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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