Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4890ed2259f403fe3fff0521170cbed46c29c594e301af28b7effea47cc09ae' 
  AND token = 'iNWOAiRk5UxIHmxIkPSJFyUFbjyTTdGMKnFhshpsrS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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