Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e65277d80a18969f901df87ff589ca45bf26c8bcbe43db9b9942707ea5ae632d' 
  AND token = 'BwtiAdMexDZ0oDQXqJYDTvbVOfibB06j35XMTkfCbaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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