Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46fb7368e346c3ea47df52070e8e364a25d6c0112271e6acfeba6eec2a163c9c' 
  AND token = 'rYr6N1nrA2tm8/V9MXDO1Idb2zvt85hRNAta19qBHQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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