Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fffd2a72bc98c8e6d2f2d4cc97fbbce464c2b6e87a6f506dbeb01bcb94f88ed8' 
  AND token = 'Gto6tIgjcAgfCW6qCr94jwFBKAdGoR23stTWjet+kAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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