Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380f2f40ccde8b23adf730b36259813a461932bea3a1434c821a230419552e83' 
  AND token = 'bAIc9KX5WaYwbiKfOkB3rJOPnHa5w/Q/qOEEMFakYmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}