Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a73859f4a038ad69169bb18ff6e4040b9628d916b9ffcce8e75da1d62ce09a4e' 
  AND token = '1zBkwVMamR8Q6e++ljyCQp0cZnbuXiov9NpX3D1BWFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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