Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae546c121241c16249305bbf686b87d9c6377d9d57e2ca4b87e19b618dbdbcd' 
  AND token = 'nSV5ottRGUcCdMxYemx33vaW2+rIehyc/XXZvq03IPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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