Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35b2a70a27a533fca1db940aaf814e402bdc02e2a7a9b5c1ee1ca4d9222f2b8c' 
  AND token = 'Y2IpibaqqcKkprnbVY7MYp07NiLTs6qVfb3cXKIAeyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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