Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5438dea8d83d8350c122db9325b2ba3589b1e8c5985131e963e6d2ea6eea4e12' 
  AND token = '/cbbEG8OLJpvbI1putqZkvwQlOllFda/vWhC8aYCFcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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