Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b06f4632e8ed1aacc4db3fee216a3798afad50d74da695708a4b04e7eec50858' 
  AND token = 'RjDLAWKdet02KsEv9KdSiUlBPWYNauysDSddALMQtVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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