Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fca73bacce3e9d3d097cd4be48b0a1f738cbb7ebe058180b772988d1caafd4a' 
  AND token = 'maU3J8k/m2qtk+kgAu5qMrKWMWjCyVwnQYRX7v7M6ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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