Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dc3f9c06061f2738a6841f7a32174f85f684ee2b45a933e0b2ac1444e8d49e9' 
  AND token = 'CaaSucxNYqYJKzSU4otaP/Gi0jzkY3hU0MvZXOTtcAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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