Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ea6f5b693c79ccf9c6420de1db56fd63beaca492bc3c4ae7c00d035d6f5b488' 
  AND token = 'kmadYgI5aUaiVVWRS9l7xjfqNMlPbOCyZ1v03r0PL88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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