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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ddd913be01d65e0d913075e9c5cf78d687ba44f9e972cacf59c54ad0ba85b90' 
  AND token = 'g9WM8vqh9oFpW4c5wYfOsVlMD0Pk+bz8C5uo4k8V8/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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