Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ec64085ba02bdac003a7c78fd101d5d88926cabac0bb39aa8f59de145755a09' 
  AND token = '7gfZfO2O56a1WtE29slJCDb5PAZXlajCpUmre/LxrsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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