Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20728c66527641d11e83f0438f803bcbed9fe7d503cfa0c41d753778b71cd029' 
  AND token = 'uLXR3fxK9yf7LySfzNrkahlm7tTvKOZDWSf17fGfzOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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