Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89d91aa873e2b7c770763bd2a0c322b0c653b3c3a6eb13e62306f6cb42b6d4ba' 
  AND token = 'mme2mBQJB1bO6O93l6Sh1arXy5b8q1R5kGNao8J8hcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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