Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0fd52376bded0f5d2b7b3e6f73cf6d5cc63ef2c6dbd464d12704c08d552162f' 
  AND token = 'wEjfedf1aVHhEA4nFaPIFhpHWm59uPHO23e8h9+ATbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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