Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ae7c88aec6b09c0eefea5b9545bf0591ef5bee823aabc54bf6e38d4e947216' 
  AND token = 'YdyJyHpxU+vg0KcrZTDW90BWjJ/5VxdF/yxpaiIAWB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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