Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7572919fbe6243caa76aeea223d8ee4fc67e9a368f7f345c06ddb5ea53789d5e' 
  AND token = 'Wy9bHaVU3wr6f5VzYSgqeimRmnclG41FRxvbwQR45pM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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