Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfe3e0abfe1d748b23f68c452b651de39419900cc30eecf1cb3cdc169e317360' 
  AND token = '1U82icFZY2BlGFDQTyXFs4faEO7eYnfJrhrh7GXAcGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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