Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4561804376a8b41668dc3666f278e8da8be1e728017c8bb1b0dc56b857b71fae' 
  AND token = 'aoYFzFSV2On1O91PXQeLZoTbvtfVfzJvCZt7ZgF2UK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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