Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eee74dd19ab4df57e4301188a01f1c45bd53b8489bb5aac445929026292863c7' 
  AND token = 'OfzhmnfFkRX6yXtZE1tXZknJzrnhxN2styoZjWUCij0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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