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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f658815da5a31c8931be05c3ad561e9ce78d9ca5ab6cec0bc5ef65ca216bdc26' 
  AND token = 'qrvlYW59WCBKhUmoodOTSFl7oJIMrZgCtUUpYDlTHFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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