Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b20b21ef885de88f540e6081512a5f7eb23029234c6d7bad2e05b83de2d718' 
  AND token = 'tBCg1PfmDx0VOJgppGkFtu2u433DyR8RU742nCDpIVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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