Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c53262c70f65ee108a036d4f09ea8f0b0f2f7238e786ea3e484dab48d288675' 
  AND token = 'vh4IVuc6bj+KMijmYHx1wbabO3MilzoMS4PCxOtyKSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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