Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b82722d0c3e66f50b098af57c937ccb7ccccbf7fba425ebd750b005700e3337' 
  AND token = '8uXLqOWsHF9e6W38dUJaTx7V8i9DyERCAsJThEuZlCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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