Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14ed0ba5fe4bb636cad7fac10d16f7efebafdb4cc0af23022c56d68facadcd81' 
  AND token = 'kMzi4WmIPmHUN8YDzhXUYGa0MHrdcnv0R7WFvGiSBkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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