Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24581848bb68774f44f6c215402159ac405859e9e3181642422642f63f328782' 
  AND token = 'qZqqAWx4XuAmCdJfLr+hFnTxOolMHFfcY4V3snTLiow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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