Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0941855cdbef21790cc2af8dba1a215114880ba47f1056fb3dfe4f5a2e8c9887' 
  AND token = '1BzB1DnDcxmAs9vAxYs1JBB1cff9DRAL4c1cH3bHJwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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