Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d9247bf20b1d4acd7a34299c2f6366778fc105c326e5085aaaa1d8fe251db85' 
  AND token = 'SYgWaUE00tfVYwS1DeXzRboCdLSlfw7Al/Rq88oE0bs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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