Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '448ea27f1b7cdb9d774523c5f9a43d75cb58246d775be5fd4e9c4854a5826cbe' 
  AND token = 'T6PABQYt/hjrDJ6HRW7UxFLvfr7F1fS3q9b8eGeudmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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