Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d6cd3ac7f669f6eb484598e46dd980b47e14771db02b6d3ed3c8afc43d5ed05' 
  AND token = 'vbQoQYndybpfj1x2+yP2GMyhamjFpoDUor6lcyxC8iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}