Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a9e0a55027b3d00440d5837caee3d9c912d4effd218836c4673b050fd654002' 
  AND token = 'X5TesWZccnM72rOcjGyu9BAEAJLi5pc78JKlZRixtik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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