Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f65067997b2f17518f73b9758b4b50a4a3fd4ab4770e8f3cb4968571a6f47d3' 
  AND token = 'xRKrp+5m4XAbQIzUu69w+9jU9DGumDL731ZSmLMOf3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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