SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fc3745d1b354c50c4ce520cd48fbc6bfa936b68d9d6b8c730cfaef822f3df62' 
  AND token = 'GQ7qulk7D83JpVbh0487j26kQ/1vYpxf6gvYuIFu/CA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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