Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3af7e628d0ffde2f8eff9c55e9ec4fffaf23f0d1ec8c0402d617e3b1cb129b8' 
  AND token = 'hgyS13VKnkbZX0pgMBVjijmN2LALjNuY1FTzjyVtOmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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