Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7baed8527849dc2634070e1f46f238b11abb729443cb9e9d1a53a10ced5211c3' 
  AND token = 'rjL9D9KhTgEJyVEtAmbQD3YrPKzrwOyLZFMkWeB59NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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