Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31d26063c90818728ae08dd613cfab951cd194088f847825606c88782d303cda' 
  AND token = 'cSmTLsPoz4mSsgmx9pSyweSt8ctZ9XCleI8bjYxnQR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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