Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb6cd5cb18eb6820498bacbb36122d28d6b05b2186353268ae5ffebc052a443' 
  AND token = 'NYH7klDvbekVd2cwKGbeMyrcyKAX5lvszul+C0LlsGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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