Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f4dad78e20c6d3458298a4a02813d37196c682d8cc23e5461ade1b9402d17a6' 
  AND token = 'nQGcZD62dG2HBPc0zYT8JA1fM10qj4hAZgYRn25VVy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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