Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '134ae1f229873c90d61c04ecdb55f7ba74d6d0a155a1d40bc3040b0572529fcd' 
  AND token = 'kUaf6XC/U1Ebql62+DbJfrxrPmyZMUbcSEvFLzf5E9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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