Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '960e13a6921bf7bcec0c1e63e08c6c2d126924b5ae68801295e4b9dbed49eecc' 
  AND token = 'OZ/cjQqCiciv1GicOVv04BzvHbekgbk6VpQy+h2kaLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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