Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '362ca6b27185712ea46c5f13fe816fe38ef6b0b9f47297b456ad6e5bbd4da362' 
  AND token = 'FXrDOwBXuamBduWQ1G0EZCtHXK2pmknl99LCGfnVPpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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