Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05c46b65dc2743b9b33bc71bb34e742e0eda110b8003d8e0e2cd21bb7882edd7' 
  AND token = 'RTLpQleEfLNExwTAkYt1JEE0IMwbtY+OfYuOAQ8ZyLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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