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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7365769e6622731bce28e20c6a7a2e495e2ca82fa6d7666444a878dd412b5ba8' 
  AND token = 'R88Watxdz1RoAJxPYLJ5FgJkiYEEsFLr7D3QRQaGljI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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