Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29816ca086507a27cec06b775785f623c893172c61624fe7a16e47ead728c8e6' 
  AND token = 'nJbGZ9eas7d4n197L0e9TIF76eN0yrK0MXWcLJHTVp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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