Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3698dc393f0d6c1d1e81b55f3f4b0edae8b186f3ff8df37a25b813c571631b4e' 
  AND token = 'CgVeBSXwOO8tYLMn8MAg1gJ2l9tYmZbgAwUNqMMWSCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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