Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dd8aefef443d4d5fcbbd4c9daee2c931bf41120b2598032eb665bf8136435a4' 
  AND token = 'YOfBTOptJLRkTOddCbZHQo74Hu75KXZ2ojQl2MbekqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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