Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38a9d50d6f8c276b72f5f9e88ef004d52280b442dcf64073ae36d269ce26ea13' 
  AND token = '+6d+I64UK4OxpRSTmUdoy+SMxqWihSxbQ4V82LXzlbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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