Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce89bc761ced005f632b62f149af5572bd64a446d10a4f4456881dbc3efce9b2' 
  AND token = 'JeJTCf9VNtAdfe4NRof85p0x31wnORJbO55mg+DfLrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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