Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0901de76e8eb87dff5c6dd7b6ea0a97dac9834929c2b238389e9dc088ea1792d' 
  AND token = 'dVZmGGkKgRqFyKAyS80Wl6bpXYpMe6JlnMLX5z1rJ7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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