Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ec93e5e72a393c09f4f0a1d045d12c8d28acde550dc76d72c47a94f39cda4a' 
  AND token = 'grzBojQF46NSNcFgqMPNCof3Z8c+AKOtXiOGz0ph1QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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