Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '101afa27d099694a8627fa7d5ecba9994893e0fd84656fe48c143e1c2cc21ac5' 
  AND token = 'nmphVD8zfKxOfTzuxxfIr26k8B+cw5b9OUXc2ACvxdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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