Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3182761427176f567fe392461c3e9e417404c8067b0aa9412611d89b08bf352d' 
  AND token = '5OoakQkpqk/6hRizjtaE9YGg2mQR6kx4yOzMMcEEzZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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