Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9590e98f76b140c3bc290e91efb4f9a6a6152216854e8c99ef17b0e966d8b95b' 
  AND token = '1i/UsLMJUV5m46V3yCms+QMi9MKD+XhD2VXkQKTYtRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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