Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '328adaf9b9885febcaa9bb58c236a792ee7c92fa1df644f84be46d841cd299f2' 
  AND token = '7GMN9rKQc7f5gMEGjk9xlfv3DBYI1KGEqpw3nMoudIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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