Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ed8aa3b78bb5d5ddebc2f83b7d904c46de8f4d62d5bd913f68a274af60e6c8e' 
  AND token = 'IPb8kW/5e9D63rT3otYMxJwjkrLeZzZVQq7McdAip1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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