Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fc9d1ae04a68c6b207f29a1cdd66ee6e427f321e0a8d2140e0202395604bc8a' 
  AND token = 'C2DdG5zpjEndE29Y5/Qs/n17LjfxlF9nmR7GYO7ChMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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