Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db0db7ed629239aa3ac51dc7d5bad27a2ef828d1e9acf4b6410cfe5a5630c607' 
  AND token = 'rsuLZ3vYtQEPGUZndgKqQ8lxQNSaaci5v6SVivakwp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}