Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4c8dfeadcf374d34486b1dc11561d1440c44ae73cd670380dca5233386f7f39' 
  AND token = 'DAtPm2M34oAVwodhyGXAqUPt6uIZHSXOas58qu7WMIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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