Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bbe9d63069956c05144e1cdad74b95a5729986607da03613eb95704d8524400' 
  AND token = 'cTeMMBSk0o8gWvCTFroItMLXT2JmrPmLlIFYz7+UyT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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