Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd997dc3668b0689d2785687912afe22ab1e9c9a5ad60d085e21608d98f0065a0' 
  AND token = 'sMJkwF/RVHOBtc+BU15fs4yj2ave2qzeurQoEY9nsoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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