Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05578c41e543db35bb3c357190d3a08edc5c45e90274f0a8ef05272b19be5da0' 
  AND token = '6fRtgsindosu56O6MFccL4OLBXboNmnFs5WZ8ikjXeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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