Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53d0b9723b59ea473a270ed98e6aec5d4398e9f76d76cfcf884bbcbf7f0d24fe' 
  AND token = 'B28Sc/4+ZG9/wmcfucwoMoya2T5hY+pTplyPwV9zXEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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