Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ace28a971be864ff432430f5377ee2c5f17792edd1f2f734b2d93bcca5138de' 
  AND token = 'Q0ZWdCy9fQEJAoVF7rP4f+ZlSEujsggPkib3VCjhmYk=' 
  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"
    }
  }
}