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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d511be982c7ca0c37dd5ac885b70c925d317cc9e219df50fd87b5f833fb5c2d' 
  AND token = 'aTNoWtQ9Tfsmlz0V6YUU0uV+sGBIC395+NUxLcTrIUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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