Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8fa4f46e0c5aafacbc47fd9cb27a1c1ceb8401ed6fb33ceaf28117822678219' 
  AND token = 'eCcxdCFZejGkzdB++8FgzkL8j1p7gD4nIOfjMksRNPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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