Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ecf203a5e380ac530a457778b4f3fbdaac17c7d5ed20b14c6e9b43648cfb580' 
  AND token = 'dSs7l6PoAMr7JJj+Bot0q2inDBUgsBwzOs/oWv31yvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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