SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2222584459fb79296c926d6830850b02b4717841272739ebc04c87df987300ef' 
  AND token = '2BnJkVt7VqlC+mxByzBfgjokj8ri3hbZL3MwMd3qG3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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