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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25cc9f185328f6ce3b5608db166ac4a769d5520f42ccb97d0a888a5820d47020' 
  AND token = 'VTBzjCg4pnMQnm9MEpHcYcOO5Qt9LAHgEHl4ydvQ7DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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