Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2ff7e249d9b45778f7f56fa918bec81d01bb82ba5763963af3811e40516c677' 
  AND token = 'CZuIy7RIgj4l5TcFntuIK0E2Hk4BkiQZQCgVgf1j9Vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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