Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1f75e0b8acb58788804fd4d25a511c6b29a60211ac35c7c42635c49b654466c' 
  AND token = '3zbA0CWIq72ddO7hQraTAAVSs/ferhyyq4Z6mIA2q4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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