Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f3028459bb76da9cc419d8e12c7f651e82c04fc2c06cc7dbc7805a8df5a45a2' 
  AND token = '/Iy5/Hv07xg/c9rF3E+ac/8Zg9ggKF3/5/0xDQZiJjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00169

JSON explain

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