Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '999d43d66c5b1ceb0b2ccfd6c4abf2fdeb78b6af45804b45f663177265c0b175' 
  AND token = 'KOQLzuobrO+qZEcOc23i9X+r/b6SKwpsPihueMlswII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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