Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5cdb2ec2499b307144e26be04c2d061339a971125bb6384702a29be1e900132' 
  AND token = '1ea1alnYNniNuKag+DTHSppDHh6F8iXD9VUCOeWXW4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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