Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48d462bd2dd3e3112f5d03e00f58b101baf0d81e35c86f5f54b1288a09da91b9' 
  AND token = 'HuO6LB9meklmoW0IjNKE0IMGZiP+6W1/CovBow4TbLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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