Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0858da2488a344d2d448d54e910bc822fa252191243bd48906317d0ae2018331' 
  AND token = 'LQqRH8uAyBePZNp6JK3empXXErtMN8lUDYTdvC7tSos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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