Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '106ae9057d0065976ffcaa363e9f4b9615510521cb9e7a757b07f028bb7f0f06' 
  AND token = 'MBI3N3BbYTJjGMcPMx5TRzWwkBb1nuA8xoGxHP9PtAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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