Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2091cd35d1d9a798aad16355107033e4db4cc590d97e5ca9bd2b3f33b733bd1' 
  AND token = 'WXCQmIAv+sUZaoXs50oxgBdG51kS3sCAB1ZvsOxl6yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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