Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a99b4b28d249fc945146846f06c058a5866c9f4d78fb9a57f76977b09d2be699' 
  AND token = '4rTsRuPIryEyQaWgrk4H/xYKrKgsgr4JKXgprgqZkVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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