Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fe5865552fc9e434ec581ed2cd4a31ecf2b8aa846dd765d9987d66b0294addd' 
  AND token = 'syLA03nI++qMtd7OdY/B0UcD9Af7yqF3EjqpEeeInRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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