Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdf3664cf53ae81ed77def910f6097b0ba271d4b3401898e15d76959dee8eecc' 
  AND token = 'AZvOYcRnUoP7acU2acFWDLu7LRM0ZAWVNa8xjEEujv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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