Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '94ac5d8789fc31373a8351dcc24366c64aaa8f00a65cd6ccbedd917179ec41e3' 
  AND token = 'DFUr7dNWnfJH9/kBgQOxJvGGLsXKGLEvua7ykgMZj5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}