Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cd1aa3d0f665db1c33db5fdb4525c9c6c60a83ad8aeb2d71befaf92a1e8c4b9' 
  AND token = 'KXRxucH/XxoTHh/ZYsD2kjoenxpSXgVeFFLgdcRwZrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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