Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3409c8c7b5aeab394272924ae183760009c7062dc4ac78b28d27cfbcb5374d1' 
  AND token = 'KZZu8Wex6+XwcPn93K7rUoDJSHfXyUosE4SgZhmHzco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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