Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86459dd13a8528819c0de3cd84b7c8fa4ffd5ef4b3fa5769c042b7cc786bc3bd' 
  AND token = 'k9GpJvhplkYghf80WVMlqfQPvvTUsabegSkvPemXZtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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