Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ab907fb5d067c2fddea10dd663b83c6da2ef2423d9f6b3d2c06492ff1b681f3' 
  AND token = '9YDKKFDFNoJVdWRZKGNapW1maZke8qCABw0LSfG/TAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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