Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f2d26ff3fb8f886a8de8edb0bec2e618780beaa89d3cbaf9a9fa8b465bd2aab' 
  AND token = 'G9/zdBi2rvWhoCKurVariQslqEp79H8CY8zvQ+UdRGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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