Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e730272f83789de8fe5a6d26a89a21670cef8a69391c6780c6c91fb7f0e521ab' 
  AND token = '2nVay7pzZ8B6YXTC1+7WnhkjM+OQjKbMr2RLSEl6prA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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