Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae4858255ff04a854b3eddac55e7c069fd86b29a9794f208e7707e8ab94e3c0c' 
  AND token = 'WTHuOEdY230NXbrLWBrQdCl0QxBjgpoVkMdiCayao5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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