Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc9018ef6b01d38edbb17e7eb2479a762da37d8cf1d0f46d7824a9b0c4d7076' 
  AND token = '6et2RsGqGil7F9+W9qjv5ZhPZM+yqBtwwgme0+gH85o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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