Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dec83eb225d9d905e35f8c93d735421cf9b99cb00e50a2e8270c4d57806ecc51' 
  AND token = '9FyB01JNcwQLrhJHYegaOC//yGhGVRip08d1NHHeE8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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