Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8563ac1043eb3f5f9653c945c865c9d8f03c435d56e35a4282308626bec35f3f' 
  AND token = 'pLbyclg9RBWjMdCzZMJC0HH5IzaeiJ1qb432h/Nlp/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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