Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfb26b570eb9f30fce41da2639927bbddb13be68de7e3f5abcca082ab6da01b2' 
  AND token = '/kbSDK9Qh+3cG431t8xHD/ocrzAw6VOhzfcQwTxHtUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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