Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '951430d8f0111f5e2c739c51c71f92c4aeb6794bdad0bade2b427c714eadf59e' 
  AND token = 'a91qmuX0byN6oZLinQtddksm3rvE8skkZNdSJQg6YPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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