Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b6a81d9c29f1907b9402ceb305f0ca371098be36e58ce82108eb1028fe67859' 
  AND token = 'TzSegnY4eo3Y8Kk6RLhrBtDKbfY4CnFmYibF9yneoQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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