Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cf02c7d69b04e4935b1c2a0dca91c5dc2461216e4cd20f83e51f833c7756c78' 
  AND token = 'KLdkI67A2zYLu3O4ZiuXSrVpzZLFqc8j34VFNrlPxH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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