Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f90ae8333518934038b71c155fa8e8412938ec94906b254f2098861731c49eda' 
  AND token = '9kpx4fYzaRLsQMzib2CclSk6vD+66SAJDpZeVna5kOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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