Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '332637acf7675aca648cde64bab65c4b5b2d23b60a7e7475b79e02544c122de7' 
  AND token = 'aBl19qMRZtIU6gDkgupzbuXm34moRZwU5YW/qdjcN70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}