Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dc1f306dff38ffbebcea613d3ea8eb728947726ac88a0820c084ec17c4d0d02' 
  AND token = 'mSbGU6IFAD0UblixP1thR7Kq3qohA4ehuYJzhBKBXro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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