Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a7492c7d63bd899601acc653fc243a07a835d71086d04c4a06558b456356a47' 
  AND token = 'Zw/fbe3iJgb7lOg2stRYaxFM7Rs7nfVJivfHslhik5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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