Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7cbbe3c65eb0fe7c811d31c07a414262b3c8c8292827ed752aa49c95a3c879a' 
  AND token = 'oSY094w3KEJOhg9KUveeZ2xYhAazWCyA9Pn2D8kBHxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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