Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98a7fe0509e0cd9132b1d915a109c3ae4abfffb295485f19e50b8bfb21f70e5e' 
  AND token = 'HjKjhgTp6lz4UUjF6N4m8SQ1rEZBgBesmjPVJhdVb9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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