Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba7418e0ac9d3e0cbe08ecc59bbff83d8d495d1191430e4cca71d9c9758d100' 
  AND token = 'PQyvj5bMjyTB/GTcWGChj/FornoyTF+DxiUFlCLWO8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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