Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c66b5eac66254680ff6de860f3641049881e0bf476bb42d9b55e3ebbe8f14ee' 
  AND token = 'ESyQjwKVOOOsuM2QZ6SN4qo+7pTnDGieO7lnI2wQs68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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