Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4824621b164a0f0e44c712637ddb9a29cc6300e27bab1ce9e4f88a683daf2b30' 
  AND token = 'hKSQlN44vvPe87EJVcFNej5tRvAMzr7e6tG0N7rClI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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