Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '104f27418344f52b46c60508e7c7aeffe59086805fad09a25a577d1e2af21991' 
  AND token = 'C5v+SoSWpM/Sy/QP6PnUEajXGuU3zbDbXOas0xTODY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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