Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa89b6147ccf143fc0bfc330e210700695f2f8e736337c695236d1950e015027' 
  AND token = 'FnzaT2Py/OifXe7YWd/Bp4T4pNe4h0KSGD41LVXxjT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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