Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5391204ac589074da3e64b41b3a7ad348bd4a157f68d7830a355fa782e85cc53' 
  AND token = 'Ex6FFgWkwihkgq4V5JTKIzdML6Rc3d/YLdps1EgssuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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