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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d6cd2a03586e33e4ae921914460416ced8da755ce82cbc22b98a57acd60cf88' 
  AND token = '9bbCtTKieOTJlSPQfwzhcZ41UlMhn06wr3U180mNr8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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