Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '073f5661e8a3a08bb7b7215c0fdb1943276747adf6818c242700be556ef597a8' 
  AND token = 'dDJlcNJ7yoAk8wZibJgEWrL7UUeFXk7vVW9smKByY1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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