Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4d40b1976f177061c10223e6e07383e5e73cdcbf1a90cc95bb5848e20bb69fe1' 
  AND token = '9MRA25ndlo6AzTR9RdPlJb32MURwn01gy1xBhroyH8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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