Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a12c978b576841f02add9c5c416d48fee8ade0b8514539b3d6d8e2735fa6a5' 
  AND token = 'mShNNoMrQcp6Te4UhO4E9mq8WjYBOAKvmnj1zafO4hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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