Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '873a85aac1fb438fcda78c6c65bb294cbeedac86b5c4b861892c4cda3b3e7fdc' 
  AND token = 'ySaN6l51RFLS0YEVzHTkfv/SseE74ksZc/CxFA9j4dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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