Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd996bea20d6b4da90c6e810d47e62a34564ffe4785ee0d58fe66b1bb775c3595' 
  AND token = '0SoWX/isPfEjS8lZNkd1x8VAP2S17fkjz6/0rqn+s5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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