Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14160d8c7aa06e8b5b01b6d7524d9c36b6267efa43369b5e0fc973ce17770c66' 
  AND token = 'oavUoPO0OV0tVwWBzYleJzZ12pDWhHTUhrw3ambGGq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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