Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1439050e7a75eccc82063eca44facf351a2438bd0e3e73c9cdbe9ea904061c6' 
  AND token = '2sM0WaFtTAbf2J5TLhitn8UaJrlMXx1VW6fbTGbpXkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}