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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd20e205976ad7334079e7f0603c0d46b2d6c8e4963113868b24b0cbd6053ce8b' 
  AND token = '4Mh58oaHUDwvcy2XK5HaHEHr70/UjtnVKKiq0LjnOyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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