Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a83e5b6f1dd425705c173806db548e331dc02b40469080440d8fbb4ef693046' 
  AND token = 'icZvlSgqx5zBsS/OMQtFJd2sI3NovuxTeV8/a+i/M2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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