Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43d042edd4f4c7b62540e9e344548fab43ccdccd2a7a899f4db283a6ac962101' 
  AND token = 'GWCeyWxdqB1aRjdrb01O2df02JqQtpYj4XGf7/6LErg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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