Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b08f28f628c378daac365c1917c0407697eff7c4f69f368082ff82e7b48fcb3' 
  AND token = 'uUr38g57AZFeJ1GbvW9cqP41IXT1rSdJVXbGohMDc7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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