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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '499333030c6dc951a7b78fe2f4b639c4b51e189eb8ff7e73c92c6e3141952aea' 
  AND token = 'rxrTjc59O7Es4yX5pQZXD4tuprEEyFqoiIZeq7QOIX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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