Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19fc829a8c308a6b4a7c79f42c427ae51a38f154f405a258976ae93439fabed9' 
  AND token = 'yLJP/i9rhehxm9Au/yf2vQmKmoAQd9Fu5iFRhYe++7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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