Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f141df5bff07d7e950db35583eddae1639de7128e84b01f8de31fd9d9d501a8' 
  AND token = 'QhVrSczxDtuGD03OVF+C7heL/KGYtWCz+LVUnuCjFVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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