Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2893efb9bb1a3041f67ae4fef3c603be7bd0b10846b289efd707e93c0773efbe' 
  AND token = 'UFxwp4VwU7p/J4SiJljUNyzQVNIwj07hDz5zYs0997Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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