Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d37b61e06fd0579eb592726860c9b59eab5fe6a2f550e86071315cec3f3cfaf' 
  AND token = 'KhLTHRMAOxg7O7J+bIm6QjvgNSxRNrpqJ5VSHX2WmSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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