SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0647fc3cacbb0497fd94e302d9aa70593c3ffacf99f48d381d8fe2b9279baed' 
  AND token = 'tXSIZipwzK8c+KbzZ4SzSQhlvzAjjgGvlJ8mb/SwTkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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