Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '814a57bc9cdf4a6fa2558fc70490e0e86f57ac81607d2206b010782607682584' 
  AND token = '/0bZdz4+tNOfV5+zMnwkMcp6uobcXqzH2iuSd8tH2vI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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