Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5ad5288ae29663cb5ab4c68223ed3ead102a9d859dff3e589209802826aeb0d7' 
  AND token = 'LT3LRZckZ+cYXy+IERSUUH4KD8ExS4Wnu3RyE4NjjUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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