Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88ea2c0fefc70ae4548be13ff524ba5bc038771a86367bf0a37bb73c88c2096b' 
  AND token = '4J9oYYdf0FTcwFIKQj3WQmOvE6hlfG9yAS7vNUeElVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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