Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '352ad7e717fea22a266859705baf823f56bc5dce52ccdb79b3ce820873231f3b' 
  AND token = 'FREAOBuo67MllhHFD8/w8T+MRV2njPQGjo3mB2K478A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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