Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc1123931df0e407f4938f79ac090acb26471ed56b78a2b0ee4139503aeccfb' 
  AND token = 'a689Y/L/9HvsxdXWcgPsvwcbQmtK5y2oVqgpur9ghkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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