Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4430a140dbc3d7ddc80021970bfa10d452d028043c86fa5156d85d32b8c21fe6' 
  AND token = 'AtaR1QkUfVrwpzLh0KK7ejTlvaulxoIcUamiPwjBm2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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