Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06729449a2309dcd8844e2bf77b7be94eea7d94c06a46c062d256af4a217a38a' 
  AND token = '/FPJYRGlMCQ6sTTIkpnNzqRMPzRfYAWVl5/E30kCoEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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