Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2576976d1411993ec7f674a56c353160979bac51f64b461f62c7ea389f0e8d3f' 
  AND token = 'QOclJGVMHNkTXC7cBaB2/YPqRf/9MleKXcxmUXBEXJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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