Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '142e6ff5877603e12eed36a61968b5e35148e0673b81b2a2626c0854bb8f4e65' 
  AND token = 'jVMy6LiUhOaNbVMZfj5c27p9MSCLwa/XLoTlQVJiOzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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