Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3b0daa40d909601e708f5f17b23eae5b8721b498be9526edc6d0137fe4a4044' 
  AND token = 'hYZpdVx+sdsDI5uUrTLDfMlIAKwFuSHd9iHelhhSlHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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