Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd2fb0fc2e6e3c0d0870839ff19fae229efce944a9eb9fb90d299a3893aef5e' 
  AND token = 'QjRU9fYF4qT6GbVwnr1Ry90cjAXRJu0J6jwJXoyzgy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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