Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96a2ea59836ba9a6c96c4e3078232a2cb2af4727c9ad0d642dc6125bc8e416e9' 
  AND token = 'D2XPAfmegwRQH6YeKDDhdZ9wGUYhlb7SvWlbOXd4/B8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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