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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11bf30bdbd4f6cba2567e95bbe7c7f028aae95953de9ef26ee50e5f8d990d614' 
  AND token = 'W3+FxQaqYSN6TzLQANgU7n4I7KaYD2ZWqAV+r4FTQeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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