Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d0f14e853beb222051f0e04ce018cc4aca604086301b3ba5e379ba219f97acb' 
  AND token = 'NmkQmzNGT7fudxUkg2jBcyVQTJqtCpgFhqodnK4mg2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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