SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e59e60628e8f9cb22e7124d55ee7f346cbe312db582ca827ba1b65049a578ee0' 
  AND token = 'vDsNLrwfHozb0QSO7rJEox0jR/wGht8lR1bthG+9YUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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