Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afe2e334d7c3b03b50570a82642f5c045d0d82caf3b62ff5c28c4bb544baa7ab' 
  AND token = 'lwxdgfj1yTlZUJDZqarUlQ1J8paSuNLLKvgt8OF1/Y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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