Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23e443843ae8eced8df64dfe88b88fe0b08920ae4c0c2330dc77f842997c7b14' 
  AND token = 'V2Af374bqoB/Z0MzZhcC016jf3STkzVK0IHWEG1wOzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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