Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '226d30ce85985376501f56c76457ffcada6f92738b736073366ca868ef33495c' 
  AND token = 'EsgvaWiLc9fWjqFA782+AQkTqGD0kyFyZgh0FRijung=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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