Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e2fc4dd83070e5706a43de2f22b7d73da454040206fefa7efd1e3c75161817d' 
  AND token = 'QAZfiCgIT/XVuL17NFbsh4i7Ynv1GebElzyBn5kK4mQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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