Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24bbed7d98b1cdf8fd1bf1a55204ddd930320b53f95eab718afa1b7d5fcee359' 
  AND token = 'QGpsNL9VO4THHUIZmPJT3bAvuIIi/UjbIFdkIzLkVjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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