Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88f70134094300aeb03fa6ac9673c1cd350182aaf39c280d5d3a046309feebab' 
  AND token = 'rV9YK9wMqtiRQ2O2LYwKt0YCswEe6DxhVwp1rdCedao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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