Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74cdd73c60279ae0c8a7f1c3bdc17b2f3704e6672f9135deb43e71dcc46ca43a' 
  AND token = 'BYiD89gbnrsovPt4yjR8gzoc6o6qJXYvrKi/LWad5QA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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