Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bf01d432976212d54e855df297e5e8b476640926562880c86825507c092515b' 
  AND token = '/bM0Q+bnCTBRm9kTJm5x9t2i5Vo2tAa3Jg0d8jj2W3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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