Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c95557a3ea448caf874a240976ccf0d1913b379a12fa447fcb3a740134d2d08' 
  AND token = 'iEq5EwpQ/A0Qdvb/5QqikbrF990CYXWocmKNpZhgsxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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