Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '25d10d6fd3061a6ec24823c9e841ad6d0213e566c99d08a6754eacde85709525' 
  AND token = '2xMQ+FoGhIwSSsm2LhhBhFPbN3ZS8HAnLLbgasBljdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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