Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17cbd904cf3af07777fc67d72412633ecbcb7755f062794bdc5e353209010efd' 
  AND token = 'gvmpO6gCblFKrU798KGW5vwlzPS0Lf/Zkhz1PzsSThI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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