SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8f2260b74f3cc519b82299a388d52bfb1eadb36a6d367d9f9199c7fdf719a6e' 
  AND token = 'zr1ETvDWJF0u4kv0/PddBzZ8gqSknT5UjXVDSG5LH5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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