Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efa402609854ca05f09f1b44e67ade9978650a9ddcab7bee4d2aa126d0100793' 
  AND token = 'xW4hxc0WCGp8n7n/kAEKCojnDgNo9PRqoezYcsHok5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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