Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10c1452203b07636ef6c572e12fa3068288a9402daaadaed9ab287bf9ae5a5f1' 
  AND token = 'LeZNYxl6/ORD4UwilFr1gdH1iyfWq5HRJthL5Ht8kXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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