Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bde5fb01bec9ee40c91faa501ccaa58cae1563dcc9ad8af0a9cb20bab5c97f8b' 
  AND token = 'E/o3uTumxGrtnkasTjT4ha9HMb6Q8jhrjUoLLRxvJrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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