Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62466d0778c3a72e69065d7354e8a6c9e3a9db87ed9c6045962bccd3249e5c83' 
  AND token = 'E/0c+qrUY4kWoNqFBEDqAOQqd0CAgPMkzKakyIw0qV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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