Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68176954119cd5db1a667215d466b926722fbc54ff1a4c2181d654b248d85f63' 
  AND token = 'WgfzMiSQFrrvTYenv8fIBFxE62d7ahmWo7Yb+P2KFLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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