Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9acd5ba1decce8b9bd2e787e14b3f25c9dafdb29a0c4c77a9c22033768d95914' 
  AND token = 'cUUGlGGQyB3MRdcQ2Qm5huz4s08IOAQPNWdSrIHlRPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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