Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb87fb42cdd14335cd8c92fbcd1aaf137b79766a8988efe72c0f19ed58ae5020' 
  AND token = 'R2E0meUPwxUJEnkGMsyykmx5N/HZeP8Sg/UkxoAhZkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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