Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '634f3a49effc7c40c4bd53f642a18c48f3e7c4bf5238668bdc99197a827297ff' 
  AND token = 'KOHklpj4c3RPZx+oJe/dYOhT8j1ObXOy4n2C6JkJpE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00078

JSON explain

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