Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ce29e3cc46a5ca08fba24f9443c4750c19d2eca96b28e153cb25263b4dba6f8' 
  AND token = 'yuLNtAKrVrVedAbeTkTLfoPDjA6mTDFHZdjbxVgJctY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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