Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99b3dcaaff8f5a3fe2333a23e31d6dbc1722c46a74996efc9263674372b5a6f7' 
  AND token = '6G9VkVX9pMqWzxer+NTsjxcyps2vR8EzaFRwStIM2DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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