Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ea0455ebdd3ffeaa9de88de61c33ce68d1e79a35acf37971037c88f627cbc4a' 
  AND token = 'XwWP62LPsAjwbkiNO5yg2B/Py5qL+DWCPfjHOjECWQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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