Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb8b89d5364bae03a3b9fc4d77e89003a7f1cd702d01d54a9ffdd7de71a6637' 
  AND token = 'aPHHJfQ1aw5VI3Q/krIfzRA4NhVfHZGaFNieNdy6iro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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