Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b96d47da1e778260bdc99a8e76549bb3a24f0dfa95c12cfe208c46f3a15f86e' 
  AND token = 'aWT9xznQARmdQbitQ4Oty3um424oQiZV4v811h3fIbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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