Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c08f498db6f4938ea3af9247af5e5d4ea3484390d3ffab1323a60fa1dcaf5dce' 
  AND token = 'k1RdKomfxFmkshRXxa5K8xbeQbhlQCP4XGUn7DI1/08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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