Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86e3a70b6cff9c6afa3ca03ee5a6f7ec59c191466aea4d97fc2a1a33a3ff152e' 
  AND token = 'jrNMH3VCozEkkB0LT3ekXx8OOQMDJzwE4AHr6csFsM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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