Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe5174c5b1d9d63aede06ab4f94d8381f866e3c1a6edeb2b81b61e93d61cb0f9' 
  AND token = '1vvxV0aQ4JGA3FrVvgXHDXb8KPbWve6KvBlO+g39lpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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