Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f72cd75e511f1781b472b47a92853a3cb7649330e0cd5ba07f3249f3ed5ba267' 
  AND token = 'rnSeMNp2UqDPEtj8+N0W+KHe5yl0EEj6cuGxlXmr8yI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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